Common use of Contact Names at UBS AG Clause in Contracts

Contact Names at UBS AG. Pre Value Payments: Pre Value Payment Investigations: (000) 000-0000 Post Value Payments: Post Value Payment Investigations: (000) 000-0000 Confirmation Queries: Confirmation Control: (000) 000-0000 ISDA Documentation: Credit Risk Management: (000) 000-0000 Swift: UBSWGB2L Fax: (000) 000-0000 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: Name: Xxxxxxxx Xxxx Name: Xxxxxxxx XxXxxxxx Title: Director Title: Associate Director Acknowledged and agreed by UBS Real Estate Securities, Inc. as of the Trade Date specified above: By: By: Name : Name : Title : Title: UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 Date: 29 March 2006 To: Xxxxx Fargo Bank, N.A., not individually, but solely as trustee on behalf of the Supplemental Interest Trust for the MASTR Asset Backed Securities Trust 2006-WMC1, Mortgage Pass Through Certificates, Series 2006-WMC1 (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 Fax No: 000-000-0000 From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March 2006 as amended and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 2006 Effective Date: 29 March 2006 Termination Date: 25 March 2010 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,460, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day Convention.

Contact Names at UBS AG. Payment Inquiries Elisa Doctor Email: XX-XXXXXXXXXX-XXXXX@xxx.xxx Pre Value Payments: Pre Value Payment Investigations: (000) 000203.719-0000 1110 Post Value Payments: Post Value Payment Investigations: (000) 000-0000 203.719.1110 Confirmation Queries: Confirmation Control: (000) 000-0000 203.719.3733 ISDA Documentation: Credit Risk Management: (000) 000-0000 Legal 203.719.4747 Swift: UBSWGB2L Fax: (000) 000-0000 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. Yours Faithfully For and on Behalf of UBS AG, London Branch By: Name: Xxxxxxxxxxx Xxxxxx Title: Associate Director By: Name: Xxxxxxxx Xxxx Name: Xxxxxxxx XxXxxxxx Title: Director Title: Associate Director Acknowledged and agreed by UBS Real Estate Securities, Inc. as of the Trade Date specified above: By: Name: Title: By: Name : Name : Title Name: Title: UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 [UBS LOGO] Date: 29 March June 2006 To: Xxxxx Fargo Bank, N.A., not individually, but solely as trustee trust administrator on behalf of the Supplemental Interest Trust for the MASTR Asset Backed Securities Trust 2006-WMC1WMC2, Mortgage Pass Through Certificates, Series 2006-WMC1 WMC2 (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 WMC2 Fax No: 000-000-0000 From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 37397646 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March June 2006 as amended and supplemented from time to time (the "“Agreement"”), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March June 2006 Effective Date: 29 March June 2006 Termination Date: 25 March 2010 June 2011 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,4603,064,600.00, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day Convention.:

Contact Names at UBS AG. Pre Value Payments: Pre Value Payment Investigations: (00000) 000-00 0000 0000 Post Value Payments: Post Value Payment Investigations: (00000) 000-00 0000 0000 Confirmation Queries: Confirmation Control: (00000) 000-00 0000 0000 ISDA Documentation: Credit Risk Management: (00000) 000-00 0000 0000 Swift: UBSWGB2L Fax: (00000) 000-00 0000 0000/2990 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: Name: Xxxxxxxx Xxxx Name: Xxxxxxxx XxXxxxxx Title: Director Title: Associate Director Acknowledged and agreed by UBS Real Estate Securities, Inc. as of the Trade Date specified above: By: By: Name : Name : Title : Title: UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 Date: 29 March 2006 November 2005 To: Xxxxx Fargo Bank, N.A.U.S. Bank National Association, not individually, in its individual capacity but solely as trustee Trustee on behalf of the Supplemental Interest Trust for Trust, with respect to the MASTR Asset Backed Securities Trust 20062005-WMC1NC2, Mortgage Pass Through Certificates, Series 20062005-WMC1 NC2 (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 Xxxxxxx Xxxxx Fax No: 000-000-0000 0000000000000 From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 37242836 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March 2006 November 2005 as amended and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 2006 November 2005 Effective Date: 29 March 2006 30 November 2005 Termination Date: 25 March 2010 2009 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,460, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day Convention.York

Contact Names at UBS AG. Pre Payment Inquiries Elisa Doctor Email: DL-XXXXXXXXXX-XXXXX@xxx.xxx Xre Value Payments: Pre Value Payment Investigations: (000) 000203.719-0000 1110 Post Value Payments: Post Value Payment Investigations: (000) 000-0000 203.719.1110 Confirmation Queries: Confirmation Control: (000) 000-0000 203.719.3733 ISDA Documentation: Credit Risk Management: (000) 000-0000 Legal 203.719.4747 Swift: UBSWGB2L Fax: (00044) 000-00 0000 0000/0090 Address: UBS AG 000 100 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please Xlease confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: Name: Xxxxxxxx Xxxx Chrxxxxxxxx Xxxxxx Name: Xxxxxxxx Jonxxxxx XxXxxxxx Title: Associate Director Title: Associate Director Acknowledged and agreed by UBS Real Estate Securities, Inc. as of the Trade Date specified above: By: By: Name : Name : Title : Title: UBS AG London Branch, 0 Xxxxxxxx 1 Fxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS XBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 [UBS LOGO] Date: 29 March 28 September 2006 To: Xxxxx Fargo Welxx Xxrgo Bank, N.A., not individually, but solely as trustee on behalf of the Supplemental Interest Trust for the MASTR Asset Backed Securities Trust 2006-WMC1NC2, Mortgage Pass Through Certificates, Series 2006-WMC1 NC2 (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 Fax No: 000-000-0000 FromGraxxx Xxxxxxx Xrom: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 37465870 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March 28 September 2006 as amended and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 28 September 2006 Effective Date: 29 March 28 September 2006 Termination Date: 25 March 2010 September 2011 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,4603,450,464.00, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 Oct-2006 3,450,464.00 25-Apr-06 Oct-2006 25-May-06 3,100,012 Nov-2006 3,402,596.00 25-May-06 Nov-2006 25-Jun-06 3,047,156 Dec-2006 3,343,372.00 25-Jun-06 Dec-2006 25-Jul-06 2,983,916 Jan-2007 3,272,832.00 25-Jul-06 Jan-2007 25-Aug-06 2,910,488 Feb-2007 3,191,200.00 25-Aug-06 Feb-2007 25-Sep-06 2,827,096 Mar-2007 3,098,740.00 25-Sep-06 Mar-2007 25-Oct-06 2,734,152 Apr-2007 2,995,900.00 25-Oct-06 Apr-2007 25-Nov-06 2,632,084 May-2007 2,883,168.00 25-Nov-06 May-2007 25-Dec-06 2,521,532 Jun-2007 2,761,232.00 25-Dec-06 Jun-2007 25-Jan-07 2,403,560 Jul-2007 2,633,064.00 25-Jan-07 Jul-2007 25-Feb-07 2,291,164 Aug-2007 2,510,920.00 25-Feb-07 Aug-2007 25-Mar-07 2,184,080 Sep-2007 2,394,504.00 25-Mar-07 Sep-2007 25-Apr-07 2,082,056 Oct-2007 2,283,556.00 25-Apr-07 Oct-2007 25-May-07 1,984,848 Nov-2007 2,177,808.00 25-May-07 Nov-2007 25-Jun-07 1,892,224 Dec-2007 2,077,016.00 25-Jun-07 Dec-2007 25-Jul-07 1,803,972 Jan-2008 1,980,948.00 25-Jul-07 Jan-2008 25-Aug-07 1,719,884 Feb-2008 1,889,376.00 25-Aug-07 Feb-2008 25-Sep-07 1,639,756 Mar-2008 1,802,092.00 25-Sep-07 Mar-2008 25-Oct-07 1,563,404 Apr-2008 1,718,892.00 25-Oct-07 Apr-2008 25-Nov-07 1,489,660 May-2008 1,630,012.00 25-Nov-07 May-2008 25-Dec-07 1,346,992 Jun-2008 1,476,924.00 25-Dec-07 Jun-2008 25-Jan-08 357,928 Jul-2008 1,339,688.00 25-Jan-08 Jul-2008 25-Feb-08 337,800 Aug-2008 1,216,708.00 25-Feb-08 Aug-2008 25-Mar-08 319,200 Sep-2008 1,106,344.00 25-Mar-08 Sep-2008 25-Apr-08 302,392 Oct-2008 1,011,588.00 25-Apr-08 Oct-2008 25-May-08 289,896 Nov-2008 957,632.00 25-May-08 Nov-2008 25-Jun-08 277,948 Dec-2008 906,676.00 25-Jun-08 Dec-2008 25-Jul-08 266,524 Jan-2009 858,556.00 25-Jul-08 Jan-2009 25-Aug-08 255,600 Feb-2009 813,148.00 25-Aug-08 Feb-2009 25-Sep-08 245,152 Mar-2009 770,248.00 25-Sep-08 Mar-2009 25-Oct-08 235,156 Apr-2009 729,720.00 25-Oct-08 Apr-2009 25-Nov-08 225,596 May-2009 691,424.00 25-Nov-08 May-2009 25-Dec-08 216,444 Jun-2009 655,232.00 25-Dec-08 Jun-2009 25-Jan-09 196,256 Jul-2009 621,032.00 25-Jan-09 Jul-2009 25-Feb-09 188,568 Aug-2009 588,704.00 25-Feb-09 Aug-2009 25-Mar-09 181,196 Sep-2009 558,144.00 25-Mar-09 Sep-2009 25-Apr-09 174,124 Oct-2009 529,252.00 25-Apr-09 Oct-2009 25-May-09 167,340 Nov-2009 501,928.00 25-May-09 Nov-2009 25-Jun-09 160,836 Dec-2009 476,092.00 25-Jun-09 Dec-2009 25-Jul-09 154,596 Jan-2010 451,656.00 25-Jul-09 Jan-2010 25-Aug-09 148,608 Feb-2010 428,540.00 25-Aug-09 Feb-2010 25-Sep-09 142,860 Mar-2010 406,672.00 25-Sep-09 Mar-2010 25-Oct-09 137,344 Apr-2010 385,980.00 25-Oct-09 Apr-2010 25-Nov-09 132,052 May-2010 366,400.00 25-Nov-09 May-2010 25-Dec-09 126,972 Jun-2010 347,868.00 25-Dec-09 Jun-2010 25-Jan-10 122,096 Jul-2010 330,328.00 25-Jan-10 Jul-2010 25-Feb-10 117,412 Aug-2010 313,720.00 25-Feb-10 Aug-2010 25-Sep-2010 297,996.00 25-Sep-2010 25-Oct-2010 283,108.00 25-Oct-2010 25-Nov-2010 269,008.00 25-Nov-2010 25-Dec-2010 255,648.00 25-Dec-2010 25-Jan-2011 242,996.00 25-Jan-2011 25-Feb-2011 231,004.00 25-Feb-2011 25-Mar-2011 219,644.00 25-Mar-2011 25-Apr-2011 208,876.00 25-Apr-2011 25-May-2011 198,668.00 25-May-2011 25-Jun-2011 188,988.00 25-Jun-2011 25-Jul-2011 179,804.00 25-Jul-2011 25-Aug-2011 171,096.00 25-Aug-2011 Termination Date 112,920 162,836.00 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Modified Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day ConventionAdjustment.

Contact Names at UBS AG. Pre Value Payments: Pre Value Payment Investigations: (000) 000-0000 203.719.1110 Post Value Payments: Post Value Payment Investigations: (000) 000-0000 203.719.1110 Confirmation Queries: Confirmation Control: (000) 000-0000 203.719.3373 ISDA Documentation: Credit Risk Management: (000) 000-0000 203.719.8184 Swift: UBSWGB2L Fax: (000) 000-0000 000.000.0000 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Address for notices or communications to the Counterparty: : c/o Wells Fargo Bank, N.A. Xxxxx Xxxxxx xxx Xxxxxxxxx Xxxxxx Xxxxxxxxxxx, XX 00000 Attn: Corporate Trust Services – MASTR Alternative Loan Trust 2006-1, and, for all other purposes is located at: 0000 Xxx Xxxxxxxxx Xxxx Xxxxxxxx, XX 00000 Attn: Corporate Trust Services – MASTR Alternative Loan Trust 2006-1 Payments to Counterparty: Xxxxx Fargo Bank, NA San Francisco, CA ABA #: 000-000-000 Acct #: 0000000000 Acct Name: SAS Clearing For Further Credit: Account # 00000000 (For all purposes) Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. This Confirmation may be executed in several counterparts, each of which shall be deemed an original but all of which together shall constitute one and the same instrument. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: Name: Xxxxxxxx Xxxx Name: Xxxxxxxx XxXxxxxx Title: Director Title: Associate Director Acknowledged and agreed Agreed by UBS Real Estate SecuritiesMASTR Alternative Loan Trust 2006-1 By: Xxxxx Fargo Bank, Inc. N.A., not in its individual capacity, but solely as Trust Administrator for MASTR Alternative Loan Trust 2006-1 as of the Trade Date specified date first written above: By: By: Name : Name : Title : Title: UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 Date: 29 March 2006 To: Xxxxx Fargo Bank, N.A., not individually, but solely as trustee on behalf of the Supplemental Interest Trust for the MASTR Asset Backed Securities Trust 2006-WMC1, Mortgage Pass Through Certificates, Series 2006-WMC1 (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 Fax No: 000-000-0000 From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March 2006 as amended and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 2006 Effective Date: 29 March 2006 Termination Date: 25 March 2010 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,460, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day ConventionLimited.

Contact Names at UBS AG. Pre Value Payments: Pre Value Payment Investigations: Investigations (00000) 000-00 0000 0000 Post Value Payments: Post Value Payment Investigations: Investigations (00000) 000-00 0000 0000 Confirmation Queries: Confirmation Control: Control (00000) 000-00 0000 0000 ISDA Documentation: Credit Risk Management: Management (00000) 000-00 0000 0000 Swift: UBSWGB2L Fax: (00000) 000-00 0000 0000/2990 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. This Agreement may be executed in several counterparts, each of which shall be deemed an original but all of which together shall constitute one and the same instrument. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: Name: Xxxxxxxx Xxxx Name: Xxxxxxxx XxXxxxxx Title: Director Name: Title: Associate Director Acknowledged and agreed Agreed by UBS Real Estate SecuritiesXxxxx Fargo Bank, Inc. N.A., not individually, but solely as Trust Administrator on behalf of the Trust as of the Trade Date specified date first written above: By: By: Name : Name : Title Name: Title: UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Limited. EXHIBIT M FORM OF INTEREST RATE SWAP AGREEMENT ASSIGNMENT AGREEMENT UBS AG has entered into the transaction listed on Attachment 2 Date: 29 March 2006 To: 1 hereto with Reference Number 37186680 (the “Old Transaction”) with UBS Real Estate Securities, Inc. (“UBS Real Estate”). For valuable consideration, receipt of which is hereby acknowledged, UBS Real Estate hereby assigns, transfers and sets over effective September 28, 2005 unto Mortgage Asset Securitization Transactions Inc. (“MASTR”), without recourse all of its rights, title and interest in and to the Old Transaction and UBS Real Estate hereby gives MASTR and its assigns full power and authority for its or their own uses and benefit, but at its or their own cost, to demand, collect, receive and give acquittance for the same or any part of thereof, and to prosecute or withdraw any suits or proceedings therefor. UBS AG hereby consents to the assignment of the Old Transaction to MASTR as herein provided. Upon the effectiveness of such assignment, for valuable consideration, receipt of which is hereby acknowledged, MASTR hereby assigns, transfers and sets over effective September 28, 2005 unto Xxxxx Fargo Bank, N.A., not individually, but solely as trustee on behalf of the Supplemental Interest Trust for supplemental interest trust created under the MASTR Pooling and Servicing Agreement, dated as of September 01, 2005, among Mortgage Asset Backed Securities Trust 2006-WMC1, Mortgage Pass Through Certificates, Series 2006-WMC1 (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 Fax No: 000-000-0000 From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives AssociationSecuritization Transactions, Inc., are incorporated into this Confirmationas Depositor, Xxxxx Fargo Bank, N.A., as Master Servicer and Trust Administrator and U.S. Bank National Association, as Trustee (the “Pooling and Servicing Agreement”), (the “Trust”), without recourse, all of its rights, title and interest in and to the Old Transaction (as so assigned and transferred, referenced by UBS AG as a new transaction with Reference Number 37204156, as listed on Attachment 2 hereto and referred to as the “New Transaction”) and MASTR hereby gives the Trust and its assigns full power and authority for its or their own uses and benefit, but at its or their own cost, to demand, collect, receive and give acquittance for the same or any part of thereof, and to prosecute or withdraw any suits or proceedings therefor. In UBS AG hereby consents to the event of any inconsistency between any assignment of the definitions listed above New Transaction to the Trust as herein provided, with the understanding that the provisions labeled “Additional Provisions” in the confirmation relating to the New Transaction shall become effective upon the assignment to the Trust. Each party hereby represents and warrants to the other that the execution, delivery and performance of this ConfirmationAssignment Agreement by it are within its powers, and have been duly authorized by all necessary corporate or other action and that this Confirmation will governAssignment Agreement constitutes its legal, valid and binding obligation. This Confirmation supplements, forms part of, Assignment Agreement shall be governed by and is subject to, the ISDA Master Agreement dated as of 29 March 2006 as amended construed and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 2006 Effective Date: 29 March 2006 Termination Date: 25 March 2010 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,460, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment interpreted in accordance with the Following Business Day Convention. With respect laws of the State of New York without regards to the Fixed Rate Payer Calculation Periodsconflict of law provisions thereof, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day Conventionother than New York General Obligations Law Section 5-1401 and 5-1402.

Contact Names at UBS AG. Pre Value Payments: Pre Value Payment Investigations: (00000) 000-00 0000 0000 Post Value Payments: Post Value Payment Investigations: (00000) 000-00 0000 0000 Confirmation Queries: Confirmation Control: (00000) 000-00 0000 0000 ISDA Documentation: Credit Risk Management: (00000) 000-00 0000 0000 Swift: UBSWGB2L Fax: (00000) 000-00 0000 0000/2990 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: Name: Xxxxxxxx Xxxx Name: Xxxxxxxx XxXxxxxx Title: Director Title: Associate Director Acknowledged and agreed by UBS Real Estate SecuritiesXxxxx Fargo Bank, Inc. N.A., not individually, but solely as Trustee of the supplemental interest trust created under the Pooling and Servicing Agreement as of the Trade Date specified above: By: By: Name Name: Name Name: Title Title: Title: UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 Date: 29 March 2006 To: EXHIBIT N FORM OF SWAP ADMINISTRATION AGREEMENT SWAP ADMINISTRATION AGREEMENT This Swap Administration Agreement, dated as of September 28, 2005 (this “Agreement”), among Xxxxx Fargo Bank, N.A., not individually, but solely as trustee on behalf of the Supplemental Interest Trust for the MASTR Asset Backed Securities Trust 2006-WMC1, Mortgage Pass Through Certificates, Series 2006-WMC1 a national banking association (“CounterpartyXxxxx Fargo”), as swap administrator (in such capacity, the “Swap Administrator”) Attn: Client Managerand as trust administrator under the Pooling and Servicing Agreement, MABS 2006-WMC1 Fax No: 000-000-0000 From: as hereinafter defined (in such capacity, the “Trust Administrator”), and UBS AG, London Branch Real Estate Securities Inc (“UBS AGUBSRES”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March 2006 as amended and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 2006 Effective Date: 29 March 2006 Termination Date: 25 March 2010 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,460, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day Convention.

Contact Names at UBS AG. Pre Value Payments: Pre Value Payment Investigations: (000) 000-0000 203.719.1110 Post Value Payments: Post Value Payment Investigations: (000) 000-0000 203.719.1110 Confirmation Queries: Confirmation Control: (000) 000-0000 203.719.3733 ISDA Documentation: Credit Risk Management: (000) 000212.713.1170 UBS AG Ref; Transaction 1: 37386983 UBS AG Ref; Transaction 2: 37399016 Re: First Horizon Alternative Mortgage Securities Trust 2006-0000 FA4 Interest Rate Cap Transaction Swift: UBSWGB2L Fax: (000) 000-0000 000.000.0000 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. This Confirmation may be executed in several counterparts, each of which shall be deemed an original but all of which together shall constitute one and the same instrument. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: NameName : Xxxxxxxx Xxxx NameName : Xxxxxxxx XxXxxxxx Title : Title: Director Title: Associate Director Acknowledged and agreed Agreed by UBS Real Estate Securities, Inc. as of the Trade Date specified date first written above: By: By: Name : Name : Title : Title: UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Limited. UBS AG Ref; Transaction 1: 37386983 UBS AG Ref; Transaction 2: 37399016 Re: First Horizon Alternative Mortgage Securities Trust 2006-FA4 Interest Rate Cap Transaction Attachment 2 Date: 29 March 30 June 2006 To: Xxxxx Fargo Bank, N.A., not individually, but solely as trustee on behalf of the Supplemental Separate Interest Trust for created pursuant to the MASTR Asset Backed Securities Trust 2006-WMC1, Mortgage Pass Through Certificates, Series 2006-WMC1 Pooling and Servicing Agreement (“Counterparty”) AttnAttention: Client Manager, MABS 2006-WMC1 Fax No: 000-000-0000 Swaps Administration From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Cap Transaction UBS AG Ref: 37325977 37399016 Dear Sirs, Sirs The purpose of this communication (a “Confirmation”) is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified belowbelow (the “Transaction”). This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified ISDA Form (as defined below) as well as a “Schedule” as referred to in the ISDA Form. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, You and is subject to, we have agreed to enter into this Agreement in lieu of negotiating a Schedule to the 1992 ISDA Master Agreement dated as of 29 March 2006 as amended and supplemented from time to time (Multicurrency-Cross Border) form (the "Agreement")“ISDA Form”) but, rather, an ISDA Form shall be deemed to have been executed by you and us on the date we entered into the Transaction (but without any Schedule except for the election of the laws of New York as the Governing Law and U.S. Dollars as the Termination Currency) on the Trade Date of the first Transaction between Counterparty us In the event of any inconsistency between the provisions of any such Agreement and UBS AGthis Confirmation, this Confirmation will prevail for the purposes of this Transaction. All provisions contained Terms capitalized but not defined shall have the meanings attributed to them in the Agreement govern this Confirmation except as expressly modified belowPooling and Servicing Agreement. The terms of the particular Swap Cap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 30 June 2006 Effective Date: 29 March Date 01 June 2006 Termination Date: 25 March 2010 Calculation Agent: UBS AG01 June 2009, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,460, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day Convention.. Calculation Amount: USD 15,000,000.00 Seller of the Cap: UBS AG UBS AG Ref; Transaction 1: 37386983 UBS AG Ref; Transaction 2: 37399016 Re: First Horizon Alternative Mortgage Securities Trust 2006-FA4 Interest Rate Cap Transaction Buyer of the Cap: Counterparty Calculation Agent: UBS AG Business Days: New York Broker: None Fixed Amounts Fixed Rate Payer: Counterparty Fixed Amount: Not Applicable Fixed Rate Payer Payment Date: Not Applicable Business Day Convention: Not Applicable Floating Amounts Floating Rate Payer: UBS AG Cap Rate: 5.0 percent per annum Floating Amount: To be determined in accordance with the following formula: Greater of (1)Calculation Amount * Floating Rate Day Count Fraction * (Floating Rate Option - Cap Rate) and (2) 0 Floating Rate Option: USD-LIBOR-BBA Designated Maturity: One Month Spread: None Floating Rate Day Count Fraction: 30/360 Floating Rate Payer Period End Dates: 01 January, 01 February, 01 March, 01 April, 01 May, 01 June, 01 July, 01 August, 01 September, 01 October, 01 November and 01 December, in each year, from and including 01 July 2006, up to and including the Termination Date, subject to no adjustment in accordance with the Business Day Convention specified immediately below. Floating Rate Payer Payment Dates: Delayed Payment shall be applicable. The Floating Rate Payer Payment Dates shall be two Business Days prior to 25 January, 25 February, 25 March 25 April, 25 May, 25 June, 25 July, 25 August, 25 September, 25 October, 25 November, and 25 December, in each year, from and including 25 July 2006 not withstanding the specified Termination Date, subject to no adjustment in accordance with the Business Day Convention specified immediately below. UBS AG Ref; Transaction 1: 37386983 UBS AG Ref; Transaction 2: 37399016 Re: First Horizon Alternative Mortgage Securities Trust 2006-FA4 Interest Rate Cap Transaction Reset Dates: First day of each Calculation Period. Business Day Convention: Modified Following

Contact Names at UBS AG. Payment Inquiries Elisa Doctor Email: XX-XXXXXXXXXX-XXXXX@xxx.xxx Pre Value Payments: Pre Value Payment Investigations: (000) 000203.719-0000 1110 Post Value Payments: Post Value Payment Investigations: (000) 000-0000 203.719.1110 Confirmation Queries: Confirmation Control: (000) 000-0000 203.719.3733 ISDA Documentation: Credit Risk Management: (000) 000-0000 Legal 203.719.4747 Swift: UBSWGB2L Fax: (00000) 000-00 0000 0000/2990 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: Name: Xxxxxxxx Xxxx Xxxxxxxxxxx Xxxxxx Name: Xxxxxxxx XxXxxxxx Title: Associate Director Title: Associate Director Acknowledged and agreed by UBS Real Estate Securities, Inc. as of the Trade Date specified above: By: By: Name : Name : Title : Title: UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 Date: 29 March 28 September 2006 To: Xxxxx Fargo Bank, N.A., not individually, but solely as trustee on behalf of the Supplemental Interest Trust for the MASTR Asset Backed Securities Trust 2006-WMC1WMC3, Mortgage Pass Through Certificates, Series 2006-WMC1 WMC3 (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 Fax No: 000-000-0000 Xxxxxx Xxxxxxx From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 37464262 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March 28 September 2006 as amended and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 28 September 2006 Effective Date: 29 March 28 September 2006 Termination Date: 25 March 2010 25September 2011 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,4603,669,732.00, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 Oct-2006 3,669,732.00 25-Apr-06 Oct-2006 25-May-06 3,100,012 Nov-2006 3,620,772.00 25-May-06 Nov-2006 25-Jun-06 3,047,156 Dec-2006 3,560,240.00 25-Jun-06 Dec-2006 25-Jul-06 2,983,916 Jan-2007 3,488,180.00 25-Jul-06 Jan-2007 25-Aug-06 2,910,488 Feb-2007 3,404,816.00 25-Aug-06 Feb-2007 25-Sep-06 2,827,096 Mar-2007 3,310,400.00 25-Sep-06 Mar-2007 25-Oct-06 2,734,152 Apr-2007 3,205,388.00 25-Oct-06 Apr-2007 25-Nov-06 2,632,084 May-2007 3,090,252.00 25-Nov-06 May-2007 25-Dec-06 2,521,532 Jun-2007 2,965,684.00 25-Dec-06 Jun-2007 25-Jan-07 2,403,560 Jul-2007 2,832,620.00 25-Jan-07 Jul-2007 25-Feb-07 2,291,164 Aug-2007 2,705,640.00 25-Feb-07 Aug-2007 25-Mar-07 2,184,080 Sep-2007 2,584,456.00 25-Mar-07 Sep-2007 25-Apr-07 2,082,056 Oct-2007 2,468,804.00 25-Apr-07 Oct-2007 25-May-07 1,984,848 Nov-2007 2,358,424.00 25-May-07 Nov-2007 25-Jun-07 1,892,224 Dec-2007 2,253,076.00 25-Jun-07 Dec-2007 25-Jul-07 1,803,972 Jan-2008 2,152,524.00 25-Jul-07 Jan-2008 25-Aug-07 1,719,884 Feb-2008 2,056,544.00 25-Aug-07 Feb-2008 25-Sep-07 1,639,756 Mar-2008 1,964,928.00 25-Sep-07 Mar-2008 25-Oct-07 1,563,404 Apr-2008 1,877,404.00 25-Oct-07 Apr-2008 25-Nov-07 1,489,660 May-2008 1,792,792.00 25-Nov-07 May-2008 25-Dec-07 1,346,992 Jun-2008 1,640,296.00 25-Dec-07 Jun-2008 25-Jan-08 357,928 Jul-2008 1,502,948.00 25-Jan-08 Jul-2008 25-Feb-08 337,800 Aug-2008 562,452.00 25-Feb-08 Aug-2008 25-Mar-08 319,200 Sep-2008 540,196.00 25-Mar-08 Sep-2008 25-Apr-08 302,392 Oct-2008 519,012.00 25-Apr-08 Oct-2008 25-May-08 289,896 Nov-2008 500,092.00 25-May-08 Nov-2008 25-Jun-08 277,948 Dec-2008 481,876.00 25-Jun-08 Dec-2008 25-Jul-08 266,524 Jan-2009 464,336.00 25-Jul-08 Jan-2009 25-Aug-08 255,600 Feb-2009 447,448.00 25-Aug-08 Feb-2009 25-Sep-08 245,152 Mar-2009 431,188.00 25-Sep-08 Mar-2009 25-Oct-08 235,156 Apr-2009 415,528.00 25-Oct-08 Apr-2009 25-Nov-08 225,596 May-2009 400,448.00 25-Nov-08 May-2009 25-Dec-08 216,444 Jun-2009 385,924.00 25-Dec-08 Jun-2009 25-Jan-09 196,256 Jul-2009 371,940.00 25-Jan-09 Jul-2009 25-Feb-09 188,568 Aug-2009 348,452.00 25-Feb-09 Aug-2009 25-Mar-09 181,196 Sep-2009 336,084.00 25-Mar-09 Sep-2009 25-Apr-09 174,124 Oct-2009 324,156.00 25-Apr-09 Oct-2009 25-May-09 167,340 Nov-2009 312,652.00 25-May-09 Nov-2009 25-Jun-09 160,836 Dec-2009 301,560.00 25-Jun-09 Dec-2009 25-Jul-09 154,596 Jan-2010 290,860.00 25-Jul-09 Jan-2010 25-Aug-09 148,608 Feb-2010 280,544.00 25-Aug-09 Feb-2010 25-Sep-09 142,860 Mar-2010 270,592.00 25-Sep-09 Mar-2010 25-Oct-09 137,344 Apr-2010 260,996.00 25-Oct-09 Apr-2010 25-Nov-09 132,052 May-2010 251,740.00 25-Nov-09 May-2010 25-Dec-09 126,972 Jun-2010 242,812.00 25-Dec-09 Jun-2010 25-Jan-10 122,096 Jul-2010 234,200.00 25-Jan-10 Jul-2010 25-Feb-10 117,412 Aug-2010 225,896.00 25-Feb-10 Aug-2010 25-Sep-2010 217,888.00 25-Sep-2010 25-Oct-2010 210,160.00 25-Oct-2010 25-Nov-2010 202,712.00 25-Nov-2010 25-Dec-2010 195,524.00 25-Dec-2010 25-Jan-2011 188,592.00 25-Jan-2011 25-Feb-2011 181,908.00 25-Feb-2011 25-Mar-2011 175,460.00 25-Mar-2011 25-Apr-2011 169,240.00 25-Apr-2011 25-May-2011 163,240.00 25-May-2011 25-Jun-2011 157,452.00 25-Jun-2011 25-Jul-2011 151,872.00 25-Jul-2011 25-Aug-2011 146,488.00 25-Aug-2011 Termination Date 112,920 141,292.00 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Modified Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day Convention.Adjustment. Fixed Amounts Fixed Rate Payer: Counterparty

Contact Names at UBS AG. Pre Value Payments: Pre Value Payment Investigations: (00000) 000-00 0000 0000 Post Value Payments: Post Value Payment Investigations: (00000) 000-00 0000 0000 Confirmation Queries: Confirmation Control: (00000) 000-00 0000 0000 ISDA Documentation: Credit Risk Management: (00000) 000-00 0000 0000 Swift: UBSWGB2L Fax: (00000) 000-00 0000 0000/2990 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. Yours Faithfully For and on Behalf of UBS AG, London Branch By: By: Name: Xxxxxxxx Xxxx Name: Xxxxxxxx XxXxxxxx Title: Director Title: Associate Director Acknowledged and agreed by UBS Real Estate Securities, Inc. as of the Trade Date specified above: By: By: Name Name: Name Name: Title : TitleTitle : UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 [UBS Graphic] Date: 29 March 2006 28 September 2005 To: Xxxxx Fargo Bank, N.A., not individually, but solely as trustee on behalf Trustee of the Supplemental Interest Trust for supplemental interest trust created under the MASTR Asset Backed Securities Trust 2006-WMC1, Mortgage Pass Through Certificates, Series 2006-WMC1 Pooling and Servicing Agreement (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 Fax No: 000-000-0000 From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March 2006 as amended and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 2006 Effective Date: 29 March 2006 Termination Date: 25 March 2010 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,460, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day Convention.

Contact Names at UBS AG. Pre Value Payments: Pre Value Payment Investigations: (000) 000-0000 203.719.1110 Post Value Payments: Post Value Payment Investigations: (000) 000-0000 203.719.1110 Confirmation Queries: Confirmation Control: (000) 000-0000 203.719.3373 ISDA Documentation: Credit Risk Management: (000) 000-0000 212.713.1170 Swift: UBSWGB2L Fax: (000) 000-0000 000.000.0000 Address: UBS AG 000 Xxxxxxxxx Xxxxxx Xxxxxx XX0X 0XX Address for notices or communications to the Counterparty: 0000 Xxx Xxxxxxxxx Xxxx Xxxxxxxx, XX 00000 Attn: Corporate Trust Services – MASTR Asset Securitization Trust 2006-1 Payments to Counterparty: Xxxxx Fargo Bank, NA San Francisco, CA ABA #: 000-000-000 Acct #: 0000000000 Acct Name: SAS Clearing For Further Credit: Interest Rate Cap, Account # 00000000 (For all purposes) Please confirm that the foregoing correctly sets forth the terms and conditions of our agreement by executing a copy of this Confirmation and returning it to us or by sending to us a letter or facsimile substantially similar to this letter, which letter or facsimile sets forth the material terms of the Transaction to which this Confirmation relates and indicates your agreement to those terms or by sending to us a return letter or facsimile in the form attached. This Confirmation may be executed in several counterparts, each of which shall be deemed an original but all of which together shall constitute one and the same instrument. Yours Faithfully For and on Behalf of UBS AG, London Branch By: ___/s/ Xxxxxxxx Moss___ By: Name___/s/ Xxxxxxxx XxXxxxxx Name : Xxxxxxxx Xxxx NameName : Xxxxxxxx XxXxxxxx TitleTitle : Director TitleTitle : Associate Director Acknowledged and agreed Agreed by UBS Real Estate SecuritiesXxxxx Fargo Bank N.A., Inc. not individually, but solely as Trust Administrator on behalf of MASTR Asset Securitization Trust 2006-1, Mortgage Pass Through Certificates, Series 2006-1 as of the Trade Date specified date first written above: By: By: /s/ Xxxxx X. Xxxxxx Name : Name : Xxxxx X. Xxxxxx Title : Title: Vice President UBS AG London Branch, 0 Xxxxxxxx Xxxxxx, Xxxxxx, XX0X 0XX UBS AG is a member of the London Stock Exchange and is regulated in the UK by the Financial Services Authority. Representatives of UBS Limited introduce trades to UBS AG via UBS Limited Attachment 2 Date: 29 March 2006 To: Xxxxx Fargo Bank, N.A., not individually, but solely as trustee on behalf of the Supplemental Interest Trust for the MASTR Asset Backed Securities Trust 2006-WMC1, Mortgage Pass Through Certificates, Series 2006-WMC1 (“Counterparty”) Attn: Client Manager, MABS 2006-WMC1 Fax No: 000-000-0000 From: UBS AG, London Branch (“UBS AG”) Subject: Interest Rate Swap Transaction UBS AG Ref: 37325977 Dear Sirs, The purpose of this communication is to confirm the terms and conditions of the Transaction entered into between us on the Trade Date specified below. This Confirmation constitutes a “Confirmation” as referred to in the Master Agreement or Agreement specified below. The definitions contained in the 2000 ISDA Definitions as published by the International Swaps and Derivatives Association, Inc., are incorporated into this Confirmation. In the event of any inconsistency between any of the definitions listed above and this Confirmation, this Confirmation will govern. This Confirmation supplements, forms part of, and is subject to, the ISDA Master Agreement dated as of 29 March 2006 as amended and supplemented from time to time (the "Agreement"), between Counterparty and UBS AG. All provisions contained in the Agreement govern this Confirmation except as expressly modified below. The terms of the particular Swap Transaction to which this Confirmation relates are as follows: General Terms Trade Date: 29 March 2006 Effective Date: 29 March 2006 Termination Date: 25 March 2010 Calculation Agent: UBS AG, unless otherwise stated in the Schedule to the Master Agreement. Business Days: New York Calculation Amount: Initially USD 3,142,460, amortizing as per Amortizing Schedule below Broker: None Amortizing Schedule: Period From Period To Calculation Amount (USD) Effective Date 25-Apr-06 3,142,460 25-Apr-06 25-May-06 3,100,012 25-May-06 25-Jun-06 3,047,156 25-Jun-06 25-Jul-06 2,983,916 25-Jul-06 25-Aug-06 2,910,488 25-Aug-06 25-Sep-06 2,827,096 25-Sep-06 25-Oct-06 2,734,152 25-Oct-06 25-Nov-06 2,632,084 25-Nov-06 25-Dec-06 2,521,532 25-Dec-06 25-Jan-07 2,403,560 25-Jan-07 25-Feb-07 2,291,164 25-Feb-07 25-Mar-07 2,184,080 25-Mar-07 25-Apr-07 2,082,056 25-Apr-07 25-May-07 1,984,848 25-May-07 25-Jun-07 1,892,224 25-Jun-07 25-Jul-07 1,803,972 25-Jul-07 25-Aug-07 1,719,884 25-Aug-07 25-Sep-07 1,639,756 25-Sep-07 25-Oct-07 1,563,404 25-Oct-07 25-Nov-07 1,489,660 25-Nov-07 25-Dec-07 1,346,992 25-Dec-07 25-Jan-08 357,928 25-Jan-08 25-Feb-08 337,800 25-Feb-08 25-Mar-08 319,200 25-Mar-08 25-Apr-08 302,392 25-Apr-08 25-May-08 289,896 25-May-08 25-Jun-08 277,948 25-Jun-08 25-Jul-08 266,524 25-Jul-08 25-Aug-08 255,600 25-Aug-08 25-Sep-08 245,152 25-Sep-08 25-Oct-08 235,156 25-Oct-08 25-Nov-08 225,596 25-Nov-08 25-Dec-08 216,444 25-Dec-08 25-Jan-09 196,256 25-Jan-09 25-Feb-09 188,568 25-Feb-09 25-Mar-09 181,196 25-Mar-09 25-Apr-09 174,124 25-Apr-09 25-May-09 167,340 25-May-09 25-Jun-09 160,836 25-Jun-09 25-Jul-09 154,596 25-Jul-09 25-Aug-09 148,608 25-Aug-09 25-Sep-09 142,860 25-Sep-09 25-Oct-09 137,344 25-Oct-09 25-Nov-09 132,052 25-Nov-09 25-Dec-09 126,972 25-Dec-09 25-Jan-10 122,096 25-Jan-10 25-Feb-10 117,412 25-Feb-10 Termination Date 112,920 With respect to the Floating Rate Payer Calculation Periods, the dates in the above schedule with the exception of the Effective Date will be subject to adjustment in accordance with the Following Business Day Convention. With respect to the Fixed Rate Payer Calculation Periods, the dates in the above schedule will be subject to No Adjustment in accordance with the Modified Following Business Day ConventionLimited.