VERSION: 3.01 (BLOOMBERG CMO BOND FILE) $ DEAL: CSFB05-4G4BBG $ PRICING: 100 PPC $ SETTLEMENT: 20050429 $ BLOCK: 1 !{ TRANCHE NAME: 4N1 } $ ORIGINAL_AMOUNT: 20500000.00 $ CURRENT_FACTOR: 1.000000000 $ CURRENT_COUPON: 5.5 $ PRINCIPAL_FREQ: 12 $...

$          VERSION: 3.01 (BLOOMBERG CMO BOND FILE)

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$          DEAL: CSFB05-4G4BBG

$       PRICING: 100 PPC

$    SETTLEMENT: 20050429

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$                 BLOCK: 1

!{         TRANCHE NAME: 4N1 }

$       ORIGINAL_AMOUNT: 20500000.00

$        CURRENT_FACTOR: 1.000000000

$        CURRENT_COUPON: 5.5

$        PRINCIPAL_FREQ: 12

$         PAYMENT_DELAY: 24

$            DATED_DATE: 20050401

$    FIRST_PAYMENT_DATE: 20050525

$     NEXT_PAYMENT_DATE: 20050525

$        ACCRUAL_METHOD: THIRTY_360

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$                 BLOCK: 2

!{         TRANCHE NAME: 2A1 }

$       ORIGINAL_AMOUNT: 177876000.00

$        CURRENT_FACTOR: 1.000000000

$        CURRENT_COUPON: 3.25 Floater Bond

$        PRINCIPAL_FREQ: 12

$         PAYMENT_DELAY: 0

$            DATED_DATE: 20050425

$    FIRST_PAYMENT_DATE: 20050525

$     NEXT_PAYMENT_DATE: 20050525

$        ACCRUAL_METHOD: THIRTY_360

Additional Floater Information

$        FLOATER_INDEX: LIBOR1MO

$        FLOATER_RESET:    Freq: 12; Next: 20050525

$      FLOATER_FORMULA: 0.00000 1.0 .40

$ FLOATER_LIMITS:Thres: 20050425 Floor: .40 Cap: 5.5

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$                 BLOCK: 3

!{         TRANCHE NAME: 4L1 }

$       ORIGINAL_AMOUNT: 6624000.00

$        CURRENT_FACTOR: 1.000000000

$        CURRENT_COUPON: 5.5

$        PRINCIPAL_FREQ: 12

$         PAYMENT_DELAY: 24

$            DATED_DATE: 20050401

$    FIRST_PAYMENT_DATE: 20050525

$     NEXT_PAYMENT_DATE: 20050525

$        ACCRUAL_METHOD: THIRTY_360

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$                 BLOCK: 4

!{         TRANCHE NAME: 4B1 }

$       ORIGINAL_AMOUNT: 13085106.00

$        CURRENT_FACTOR: 1.000000000

$        CURRENT_COUPON: 5.5

$        PRINCIPAL_FREQ: 12

$         PAYMENT_DELAY: 24

$            DATED_DATE: 20050401

$    FIRST_PAYMENT_DATE: 20050525

$     NEXT_PAYMENT_DATE: 20050525

$        ACCRUAL_METHOD: THIRTY_360

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$               PHANTOM: 5

!{         TRANCHE NAME: 2A2 }

$       ORIGINAL_AMOUNT: 177876000.00

$        CURRENT_FACTOR: 1.000000000

$        CURRENT_COUPON: 2.25 Floater Bond

$        PRINCIPAL_FREQ: 12

$         PAYMENT_DELAY: 0

$            DATED_DATE: 20050425

$    FIRST_PAYMENT_DATE: 20050525

$     NEXT_PAYMENT_DATE: 20050525

$        ACCRUAL_METHOD: THIRTY_360

Additional Floater Information

$        FLOATER_INDEX: LIBOR1MO

$        FLOATER_RESET:    Freq: 12; Next: 20050525

$      FLOATER_FORMULA: 0.00000 -1 5.1

$ FLOATER_LIMITS:Thres: 20050425 Floor: 0. Cap: 5.1

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$               TRANCHE: 1

$                  NAME: "4N1"

$                 CSORT: 1

$                  TYPE: NAS

$          RECORD_DELAY: 24

$    COMPOSITION: BLOCK: 1 PRIN: 100.000000000 INT: 100.000000000

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$               TRANCHE: 2

$                  NAME: "2A1"

$                 CSORT: 2

$                  TYPE: FLT

$          RECORD_DELAY: 0

$    COMPOSITION: BLOCK: 2 PRIN: 100.000000000 INT: 100.000000000

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$               TRANCHE: 3

$                  NAME: "2A2"

$                 CSORT: 3

$                  TYPE: FLT,NTL

$          RECORD_DELAY: 0

$              NOTIONAL:

$    COMPOSITION: BLOCK: 5 PRIN: 100.000000000 INT: 100.000000000

!  ( notional tranche name is 2A2 )

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$               TRANCHE: 4

$                  NAME: "4L1"

$                 CSORT: 4

$                  TYPE:

$          RECORD_DELAY: 24

$    COMPOSITION: BLOCK: 3 PRIN: 100.000000000 INT: 100.000000000

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$               TRANCHE: 5

$                  NAME: "4B1"

$                 CSORT: 5

$                  TYPE: SUB

$          RECORD_DELAY: 24

$    COMPOSITION: BLOCK: 4 PRIN: 100.000000000 INT: 100.000000000

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$     END_TRANCHES:

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     END OF BOND FILE

***************************************************

$         VERSION: 3.03 (BLOOMBERG CMO COLLATERAL FILE)

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$    AGENCY_LIST:     Type   Factor Date    P/Y Delay     BV Delay

                    WHOLE 20050401 55 54

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$     ASSUMED_POOLS:

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!G Pool Number  Pool Type    NET-CPN CURR--FACT ORIG--BALANCE  PY-FEE  BV-FEE PY/BV/BLN-W AGE

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   M 1 WHOLE XX/XX 5.500000000 1.00000000 218085106.00 0.450000000 0.450000000 357 357 357 3