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OÅering Circular Supplement (To OÅering Circular Dated March 1, 2002) There are two OÅering Circular Supplements for 2439 (one for Group 1 and one for Groups 2-5). Both are included in this Ñle. $1,400,000,000 Freddie Mac Multiclass CertiÑcates, Series 2439 Group 1 Classes V OÅered Classes: REMIC Classes shown below and MACR Classes shown on Appendix A Underlying Assets: Freddie Mac PCs Payment Dates: Monthly beginning in May 2002 Tax Status: Double-Tier REMIC Form of Classes: Regular and MACR Classes: Book-entry on Fed System Residual Classes: CertiÑcated OÅering Terms: The underwriter named below is oåering the Classes in negotiated transactions at varying prices Closing Date: April 15, 2002 REMIC Original Principal Class Interest CUSIP Final Payment Classes Balance Type(1) Coupon Type(1) Number Date CO ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ $ 24,138,234 TAC 0.0% PO 31339W N Y 8 November 15, 2030 DO ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 43,475,516 TAC 0.0 PO 31339WML7 April 15, 2032 FG ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 202,841,250 TAC (2) FLT 31339WMM5 April 15, 2032 FY ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 112,651,058 SCH (2) FLT 31339WMN3 April 15, 2032 GO ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 46,937,942 SCH 0.0 PO 31339W M P 8 April 15, 2032 LA ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 73,886,000 PAC 5.5 FIX 31339WMQ6 July 15, 2010 LB ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 76,506,000 PAC 5.5 FIX 31339WMR4 January 15, 2015 LC ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 104,664,000 PAC 5.5 FIX 31339W M S 2 April 15, 2019 LD ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 66,309,000 PAC 5.5 FIX 31339W M T 0 May 15, 2021 LE ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 169,291,000 PAC 6.0 FIX 31339WMU7 June 15, 2025 LF ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 115,783,000 PAC 6.0 FIX 31339W N F 9 August 15, 2027 LG ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 209,387,000 PAC 6.0 FIX 31339W N G 7 September 15, 2030 LI ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 26,780,416 NTL(PAC) 6.0 FIX/IO 31339WNH5 May 15, 2021 LZ ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 21,000,000 SUP 6.0 FIX/Z 31339WMV5 April 15, 2032 QZ ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 58,462,000 PAC 6.0 FIX/Z 31339WMW3 April 15, 2032 VQ ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 42,196,000 AD/PAC 6.0 FIX 31339W N R 3 May 15, 2011 VR ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 32,471,000 AD/PAC 6.0 FIX 31339W N S 1 January 15, 2016 YG ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 46,937,942 NTL(SCH) (2) INV/IO 31339W N T 9 April 15, 2032 YH ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 24,138,234 NTL(TAC) (2) INV/IO 31339W N 7 7 November 15, 2030 YI ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 43,475,516 NTL(TAC) (2) INV/IO 31339W N 8 5 April 15, 2032 ZL ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 1,000 SCH 6.0 FIX/Z 31339W N 9 3 April 15, 2032 R ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 NPR 0.0 NPR 31339W N 2 8 April 15, 2032 RS ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 NPR 0.0 NPR 31339W N 3 6 April 15, 2032 (1) See Appendix II to the OÅering Circular. (2) See Terms Sheet Ì Interest. The CertiÑcates may not be suitable investments for you. You should consider carefully the risks of investing in them. Certain Risk Considerations on page S-2 highlights some of these risks. You should purchase CertiÑcates only if you have read and understood this Supplement, the attached OÅering Circular and the documents listed under Available Information. We guarantee principal and interest payments on the CertiÑcates. These payments are not guaranteed by and are not debts or obligations of the United States or any federal agency or instrumentality other than Freddie Mac. The CertiÑcates are not tax-exempt. Because of applicable securities law exemptions, we have not registered the CertiÑcates with any federal or state securities commission. No securities commission has reviewed this Supplement. Banc of America Securities LLC April 1, 2002

CERTAIN RISK CONSIDERATIONS Although we guarantee the payments on the CertiÑcates, and so bear the associated credit risk, as an investor you will bear the other risks of owning mortgage securities. This section highlights some of these risks. You should also read Risk Factors and Prepayment, Yield and Suitability Considerations in the OÅering Circular for further discussions of these risks. The CertiÑcates May Not be Suitable Investments for You. The CertiÑcates are complex securities. You should not purchase CertiÑcates unless you are able to understand and bear the associated prepayment, interest rate, yield and market risks. In particular, the Interest Only, Principal Only, Inverse Floating Rate, Support, Accrual and Residual Classes have special risks and are not suitable for all investors. Prepayments Can Reduce Your Yield. The yield on your CertiÑcates could be lower than you expect if: You buy your CertiÑcates at a premium over their principal amount and principal payments are faster than you expect. You buy your CertiÑcates at a discount to their principal amount and principal payments are slower than you expect. This is especially true for a Principal Only Class. If you buy an Interest Only Class and prepayments are fast, you may not even recover your investment. LIBOR Levels Can Reduce Your Yield if You Own a Floating Rate or Inverse Floating Rate Class. The yield on your CertiÑcates could be lower than you expect if: You buy a Floating Rate Class and LIBOR levels are lower than you expect. You buy an Inverse Floating Rate Class and LIBOR levels are higher than you expect. If you buy an Interest Only Inverse Floating Rate Class, you may not even recover your investment if LIBOR levels are high or prepayments are fast. The CertiÑcates are Subject to Market Risks. You will bear all of the market risks of your investment. The market value of your CertiÑcates will vary over time, primarily in response to changes in prevailing interest rates. If you sell your CertiÑcates when their market value is low, you may experience signiñcant losses. The underwriter named on the front cover (the ""Underwriter'') intends to make a market for the purchase and sale of the CertiÑcates after they are issued, but has no obligation to do so. A secondary market may not develop. Even if one does develop, it may not be liquid enough to allow you to sell your CertiÑcates easily or at your desired price. Our Multiclass CertiÑcates OÅering Circular dated March 1, 2002 (the ""OÅering Circular''), attached to this Supplement, deñnes many of the terms we use in this Supplement. S-2

TERMS SHEET This Terms Sheet contains selected information about this Series. You should refer to the remainder of this Supplement for further information. In this Supplement, we refer to Classes only by their letter designations. For example, ""R'' refers to the R Class of this Series. This Series consists of multiple Groups of Classes. We are oåering the Group 1 Classes by means of this Supplement. We are oåering the other Classes by means of a separate Supplement dated the same date as this Supplement. They will receive principal and interest payments as described in their Supplement. Interest The Fixed Rate Classes bear interest at the Class Coupons shown on the front cover and Appendix A. CO, DO, GO and LO are Principal Only Classes and do not bear interest. The Floating Rate and Inverse Floating Rate Classes bear interest as shown in the following table. The initial Class Coupons apply only to the Ñrst Accrual Period. We determine LIBOR using the BBA Method. Initial Class Class Coupon Subject to Class Coupon Class Coupon Formula Minimum Rate Maximum Rate FG ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 3.45% LIBOR 1.55% 1.55% 8.0% FY ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 2.5 LIBOR 0.6% 0.6 8.5 SG* ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 13.65 19.35% (LIBOR 3.0) 0 19.35 SH* ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 27.3 38.7% (LIBOR 6.0) 0 38.7 SI* ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 13.65 19.35% (LIBOR 3.0) 0 19.35 SY* ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 8.8 10.32% (LIBOR 0.8) 4.0 10.32 YC* ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 13.65 19.35% (LIBOR 3.0) 0 19.35 YD* ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 13.65 19.35% (LIBOR 3.0) 0 19.35 YE* ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 14.4 18.96% (LIBOR 2.4) 0 18.96 YG ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 14.4 18.96% (LIBOR 2.4) 0 18.96 YH ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 13.65 19.35% (LIBOR 3.0) 0 19.35 YI ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 13.65 19.35% (LIBOR 3.0) 0 19.35 YJ*ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 27.3 38.7% (LIBOR 6.0) 0 38.7 YK* ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 27.3 38.7% (LIBOR 6.0) 0 38.7 * MACR Class. See Appendix V to the OÅering Circular and Payments Ì Interest. Notional Classes Original Notional Class Principal Amount Reduces Proportionately With LI $26,780,416 LA, LB, LC and LD, as a whole (PAC) MI* 19,297,166 LF (PAC) SI* 67,613,750 CO and DO, as a whole (TAC) UI* 28,215,166 LE (PAC) YG 46,937,942 GO (SCH) YH 24,138,234 CO (TAC) YI 43,475,516 DO (TAC) * MACR Class. See Payments Ì Interest Ì Notional Classes. S-3

MACR Classes The Group 1 Classes include MACR Classes. Appendix A shows the characteristics of the MACR Classes and the Combinations of REMIC and MACR Classes. See Appendix III to the OÅering Circular for a description of MACR CertiÑcates and exchange procedures and fees. Principal REMIC Classes On each Payment Date, we pay: The LZ Accrual Amount in the following order of priority: 1. To the Scheduled and TAC Classes, until reduced to their Aggregate Targeted Balance, allocated as follows: A a. To the Scheduled Classes, until reduced to their Aggregate Targeted Balance, Scheduled B allocated as follows: i. To FY and GO, pro rata, while outstanding D ii. To ZL, while outstanding A b. Concurrently: TAC B i. 25% to CO and DO, in that order, while outstanding D ii. 75% to FG, while outstanding Scheduled A c. To the Scheduled Classes as shown in Step 1.a., but without regard to their B D Aggregate Targeted Balance, while outstanding Accrual A B D 2. To LZ Accretion A Directed B The QZ Accrual Amount to VQ and VR, in that order, until retired, and then to QZ and Accrual D Scheduled A and Accrual B The ZL Accrual Amount to FY and GO, pro rata, until retired, and then to ZL D The Group 1 Asset Principal Amount in the following order of priority: PAC A 1. Beginning in June 2003, to LA, LB, LC, LD, LE, LF, LG, VQ, VR and QZ, in that B D order, until reduced to their Aggregate Targeted Balance 2. To the Scheduled and TAC Classes, until reduced to their Aggregate Targeted Balance, allocated as follows: A a. To the Scheduled Classes, until reduced to their Aggregate Targeted Balance, Scheduled B allocated as follows: i. To FY and GO, pro rata, while outstanding D ii. To ZL, while outstanding A b. Concurrently: TAC B i. 25% to CO and DO, in that order, while outstanding D ii. 75% to FG, while outstanding Scheduled A c. To the Scheduled Classes as shown in Step 2.a., but without regard to their B D Aggregate Targeted Balance, while outstanding S-4

A Support B 3. To LZ, until retired D A Scheduled 4. To the Scheduled and TAC Classes, as shown in Step 2, but without regard to the and TAC B D Aggregate Targeted Balance for all of these Classes, until retired A PAC B 5. To LA, LB, LC, LD, LE, LF, LG, VQ, VR and QZ, in that order, until retired D The ""Aggregate Targeted Balances'' are in Appendix B. They were calculated using the following Structuring Ranges and Rate: PACÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ Scheduled ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ Scheduled and TAC ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ Structuring Range or Rate 100% PSA - 250% PSA 129% PSA - 167% PSA* 132% PSA * The Scheduled Classes and their related MACR Classes do not hold to their Aggregate Targeted Balances schedule at all constant percentages of PSA within their Structuring Range. See Payments Ì Principal and Prepayment and Yield Analysis. MACR Classes On each Payment Date when MACR CertiÑcates are outstanding, we allocate principal payments from the applicable REMIC CertiÑcates to the related MACR CertiÑcates that are entitled to principal, as described under MACR CertiÑcates in the OÅering Circular. REMIC Status We will form an Upper-Tier REMIC Pool and a Lower-Tier REMIC Pool for the Group 1 Classes of this Series. We will elect to treat each REMIC Pool as a REMIC under the Code. R and RS will be ""Residual Classes'' and the other Group 1 Classes shown on the front cover will be ""Regular Classes.'' The Residual Classes will be subject to transfer restrictions. See Certain Federal Income Tax Consequences in this Supplement and the OÅering Circular. S-5

Weighted Average Lives (in years)* PSA Prepayment Assumption 0% 100% 157% 250% 400% CO, YC, YH and YJÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 27.1 16.8 7.5 1.7 1.1 DO, YD, YI and YKÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 28.3 21.7 20.2 4.0 2.1 FG, LO, SG, SH and SIÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 27.9 20.0 15.7 3.2 1.7 FY, GO, LJ, SY, YE and YG ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 19.5 8.6 3.0 3.0 2.0 LA ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 4.0 1.7 1.7 1.7 1.7 LB ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 8.4 2.5 2.5 2.5 2.5 LC ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 12.1 3.5 3.5 3.5 3.3 LD ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 14.8 4.5 4.5 4.5 3.7 LE, LK, LT, LU, LV and UI ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 17.7 6.0 6.0 6.0 4.4 LF, LW, LX, LY, MI and ML ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 20.5 8.0 8.0 8.0 5.5 LG ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 23.0 11.0 11.0 11.0 7.3 LH ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 25.3 18.2 18.2 18.2 12.4 LI ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 9.9 3.1 3.1 3.1 2.8 LZ ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 29.6 27.3 1.5 0.6 0.3 QZ ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 25.3 18.2 18.2 18.2 13.2 VQ ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 5.0 5.0 5.0 5.0 5.0 VR ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 11.6 11.6 11.6 11.6 9.5 ZL ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 26.7 15.0 8.8 13.8 3.2 Group 1 Assets ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 20.8 11.3 8.9 6.5 4.5 * We calculate weighted average lives based on the assumptions described in Prepayment and Yield Analysis. The actual weighted average lives are likely to diåer from those shown, perhaps signiñcantly. The Assets The ""Group 1 Assets'' consist of $1,400,000,000 of Freddie Mac 6.0% per annum 30-year PCs. See General Information Ì Structure of Transaction. Assumed Mortgage Characteristics (as of April 1, 2002) Remaining Term Per Annum to Maturity Loan Age Per Annum Interest Rate Principal Balance (in months) (in months) Interest Rate of Related PCs $1,400,000,000 358 2 6.45% 6.0% The actual characteristics of the Mortgages diåer from those shown, in some cases signiñcantly. See General InformationÌ The Mortgages. S-6

AVAILABLE INFORMATION You should purchase CertiÑcates only if you have read and understood this Supplement, the OÅering Circular and the following documents: Our Mortgage Participation CertiÑcates OÅering Circular dated February 1, 2001 and the related OÅering Circular Supplements dated May 9, 2001 and February 22, 2002, which together describe Gold PCs generally. Our Giant and Other Pass-Through CertiÑcates OÅering Circular dated December 1, 1999 and the related OÅering Circular Supplement dated May 9, 2001, which together describe Gold Giant PCs generally. Our Information Statement dated March 29, 2002 and any Information Statement Supplements we publish through the time of purchase. This Supplement incorporates by reference the documents listed above. We will also publish a Supplemental Statement applicable to this Series shortly after the Closing Date. The Supplemental Statement will contain a schedule of the Group 1 Assets and other information. You can obtain the documents listed above, the Agreement and current information concerning the Group 1 Assets and the CertiÑcates from our Investor Inquiry Department or our Internet Web- Site as described on page 3 of the OÅering Circular. You can also obtain the documents listed above from the Underwriter at: Banc of America Securities LLC Prospectus Department 200 North College Street 3rd Floor Charlotte, North Carolina 28255 (704) 388-5703 The Agreement GENERAL INFORMATION We will create the CertiÑcates under the Multiclass CertiÑcates Agreement dated March 1, 2002 and a Terms Supplement for the Group 1 Classes dated the Closing Date (together, the ""Agreement''). You should refer to the Agreement for a complete description of your rights and obligations and those of Freddie Mac. You will acquire your CertiÑcates subject to the terms and conditions of the Agreement, including the Terms Supplement. Form of CertiÑcates The Group 1 Classes are issued, held and transferable on the Fed System. The Residual Classes are issued and held in certiñcated form and are transferable at the oçce of the Registrar. Only a Fed Participant can be a Holder of a Regular or MACR Class. As an investor in CertiÑcates, you are not necessarily the Holder. S-7

See Description of CertiÑcates Ì Form, Holders and Payment Procedures in the OÅering Circular. Structure of Transaction General With respect to Group 1, this Series is a Double-Tier Series, structured as follows: REMIC Pool Classes Issued from REMIC Pool REMIC Pool Assets Upper-Tier All Regular Classes and R All Lower-Tier regular interests Lower-Tier RS The Group 1 Assets See Description of CertiÑcates Ì REMIC Pool Structures in the OÅering Circular. The Group 1 Assets The Group 1 Assets are Gold PCs and/or Gold Giant PCs. The Mortgages The Mortgages underlying the Group 1 Assets (the ""Mortgages'') are Ñxed-rate, Ñrst lien residential mortgages and mortgage participations. For purposes of this Supplement, we have made certain assumptions regarding the Mortgages, as shown under Terms Sheet Ì Assumed Mortgage Characteristics. However, the actual characteristics of most of the Mortgages diåer from those assumed, perhaps signiñcantly. This is the case even if the weighted average characteristics of the Mortgages are the same as those of mortgages having the characteristics assumed. PAYMENTS Payment Dates; Record Dates We make payments of principal and interest on the CertiÑcates on each Payment Date, beginning in the month following the Closing Date. A ""Payment Date'' is the 15th of each month or, if the 15th is not a Business Day, the next Business Day. On each Payment Date, any payment on a CertiÑcate is made to the Holder of record as of the end of the preceding calendar month (a ""Record Date''). Method of Payment You will receive payments on your CertiÑcates in the manner described under Description of CertiÑcates Ì Form, Holders and Payment Procedures in the OÅering Circular. Categories of Classes For purposes of principal and interest payments, we have categorized the Classes as shown under ""Principal Type'' and ""Interest Type'' on the front cover and Appendix A. Appendix II to the OÅering Circular explains the abbreviations used for categories of Classes. S-8

Interest We pay 30 days' interest on each Payment Date to the Holders of each Class on which interest has accrued, except that the Accrual Classes receive payments as described below. We calculate each interest payment on the outstanding balance of the Class as of the related Record Date and on the basis of a 360-day year of twelve 30-day months. Accrual Period The ""Accrual Period'' for each Payment Date is: For Fixed Rate Classes Ì the preceding calendar month. For Floating Rate and Inverse Floating Rate Classes Ì from the 15th of the preceding month to the 15th of the month of the Payment Date. Fixed Rate Classes The Fixed Rate Classes bear interest at the Class Coupons shown on the front cover and Appendix A. Principal Only Classes CO, DO, GO and LO are Principal Only Classes and do not bear interest. Notional Classes The Notional Classes do not receive principal payments. For calculating interest payments, the Notional Classes have notional principal amounts that will reduce as shown under Terms Sheet Ì Notional Classes. Floating Rate and Inverse Floating Rate Classes The Floating Rate and Inverse Floating Rate Classes bear interest as shown under Terms Sheet Ì Interest. Their Class Coupons are based on one-month LIBOR. We determine LIBOR and calculate the Class Coupons for the Floating Rate and Inverse Floating Rate Classes as described in Appendix V to the OÅering Circular. Accrual Classes LZ, QZ and ZL are Accrual Classes. The Accrual Classes do not receive interest payments; rather, interest accrued on each Accrual Class during each Accrual Period is added to its principal amount on the related Payment Date. We pay principal on each Accrual Class, including accrued interest that has been added to its principal amount, as described under Terms Sheet Ì Principal. Principal We pay principal on each Payment Date to the Holders of the Classes on which principal is then due. Holders receive principal payments on a pro rata basis among the CertiÑcates of their Class. S-9

Amount of Payments The principal payments on the Group 1 Classes on each Payment Date equal: The amount of interest accrued on LZ, QZ and ZL during the related Accrual Period and not payable as interest on that Payment Date (the ""LZ Accrual Amount,'' the ""QZ Accrual Amount'' and so forth). The amount of principal required to be paid in the same month on the Group 1 Assets (the ""Group 1 Asset Principal Amount''). Allocation of Payments On each Payment Date, we pay the Accrual Amounts and the Group 1 Asset Principal Amount for that Payment Date as described under Terms Sheet Ì Principal. Class Factors General We make Class Factors available on or about the Ñfth business day of each month after the Closing Date. See Description of CertiÑcates Ì Payments Ì Class Factors in the OÅering Circular. Use of Factors You can calculate principal and interest payments by using the Class Factors. For example, the reduction (or for an Accrual Class, the increase) in the balance of a CertiÑcate in February will equal its original balance times the diåerence between its January and February Class Factors. The amount of interest to be paid on (or for an Accrual Class, added to the principal amount of) a CertiÑcate in February will equal 30 days' interest at its Class Coupon, accrued during the related Accrual Period, on the balance of that CertiÑcate determined by its January Class Factor. Guarantees We guarantee to each Holder of a CertiÑcate the timely payment of interest at its Class Coupon and the payment of its principal amount as described in this Supplement. See Description of CertiÑcates Ì Payments Ì Guarantees in the OÅering Circular. 1% Clean-up Call We have a 1% Clean-up Call Right. If we exercise this right, all of the Classes then outstanding will be paid in full and will retire. See Description of CertiÑcates Ì Payments Ì 1% Clean-up Call in the OÅering Circular. Residual Proceeds Upon surrender of their CertiÑcates to the Registrar, the Holders of each Residual Class will receive the proceeds of any remaining assets of the related REMIC Pool after all required principal and interest payments on the Group 1 Classes have been made. Any remaining assets are likely to be insigniñcant. See Description of CertiÑcates Ì Payments Ì Residual Classes in the OÅering Circular. S-10

General Mortgage Prepayments PREPAYMENT AND YIELD ANALYSIS The rates of principal payments on the Group 1 Assets and CertiÑcates will depend on the rates of principal payments, including prepayments, on the underlying Mortgages. The Mortgages are subject to prepayment at any time without penalty. Mortgage prepayment rates Öuctuate continuously and, in some market conditions, substantially. See Prepayment, Yield and Suitability Considerations Ì Prepayments in the OÅering Circular for a discussion of Mortgage prepayment considerations and risks. Yield As an investor in the CertiÑcates, your yield will depend on: Your purchase price. The rate of principal payments on the underlying Mortgages. The actual characteristics of the underlying Mortgages. If you own a Floating Rate or Inverse Floating Rate Class, the level of LIBOR. If you own a Fixed Rate Class, the delay between its Accrual Period and the related Payment Date. See Prepayment, Yield and Suitability Considerations Ì Yields in the OÅering Circular for a discussion of yield considerations and risks. Suitability The CertiÑcates may not be suitable investments for you. See Prepayment, Yield and Suitability Considerations Ì Suitability in the OÅering Circular for a discussion of suitability considerations and risks. Modeling Assumptions To prepare the tables in this Supplement, we have made several assumptions. Unless otherwise noted, each table employs the following assumptions (the ""Modeling Assumptions''), among others: The Mortgages have the characteristics shown under Terms Sheet Ì Assumed Mortgage Characteristics. The Group 1 Classes and Assets always receive payments on the 15th of the month, whether or not a Business Day. We do not exercise our 1% Clean-up Call Right. Each Group 1 Class is outstanding from the Closing Date to retirement and no exchanges occur. S-11

The Modeling Assumptions, like any other stated assumptions, are likely to diåer from actual experience in many cases. For example, the Mortgages have characteristics more diverse than those assumed, many Payment Dates will occur on a Business Day after the dates assumed and we may exercise our 1% Clean-up Call Right. Moreover, Mortgage prepayment rates will diåer from the percentages of PSA shown in the tables. These diåerences will aåect the actual payment behavior, weighted average lives and yields of the Classes, perhaps signiñcantly. See Prepayment, Yield and Suitability Considerations Ì Tabular Information in Supplements in the OÅering Circular for descriptions of weighted average life and yield calculations and the PSA prepayment model. Prepayment and Weighted Average Life Considerations Accretion Directed Classes Payments of principal on the Accretion Directed Classes should be stable in varying degrees under relatively slow prepayment scenarios because the QZ Accrual Amount will be dedicated to making principal payments on those Classes until they retire. The weighted average life of an Accretion Directed Class cannot exceed its weighted average life as shown in the following table under any prepayment scenario, even a scenario where there are no prepayments. Based on the Modeling Assumptions, each Accretion Directed Class would retire on, but not before, its Final Payment Date if the underlying Mortgages prepay at any rate at or below the rate shown for that Class until it retires. The principal payment stability of the Accretion Directed Classes is supported primarily by their receipt of the QZ Accrual Amount. They are protected against early retirement by the Classes shown in the table. When those Classes retire, however, each Accretion Directed Class, if outstanding, will become sensitive to Mortgage prepayments and may retire before its Final Payment Date. Accretion Directed Classes Maximum Weighted Average Life Prepayment Rate Class (in Years) Final Payment Date at or below Protected By VQ ÏÏÏÏÏÏÏÏÏÏÏÏÏ 5.0 May 15, 2011 406% PSA E F Other Group 1 Classes VR ÏÏÏÏÏÏÏÏÏÏÏÏÏ 11.6 January 15, 2016 253% PSA H except LH and QZ The underlying Mortgages have characteristics that diåer from the Modeling Assumptions. As a result, even if the Mortgages prepay at a rate at or somewhat below the rate shown for an Accretion Directed Class, that Class could retire before its Final Payment Date and its weighted average life could shorten. PAC, Scheduled and TAC Classes Principal payments on the PAC, Scheduled and TAC Classes should be more stable than would be the case if they did not receive such payments, to the extent of available principal, in accordance with their schedules. Moreover, they will have cumulative priorities for future payments if they fall behind their schedules. Based on the Modeling Assumptions, each of these Classes has a range of constant Mortgage prepayment rates (an ""EÅective Range'') or a single constant Mortgage prepayment rate (an ""EÅective Rate'') at which it would receive scheduled payments. The EÅective S-12

Range or Rate at any time depends on the actual or assumed characteristics of the underlying Mortgages at that time. Based on the Modeling Assumptions, each PAC, Scheduled or TAC Class would receive scheduled payments until retirement if the underlying Mortgages were to prepay at any constant percentage of PSA within its initial EÅective Range, or at its initial EÅective Rate, shown in the following table. Class Initial EÅective Ranges and Rates Range or Rate PAC LA ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ LB ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ LC ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ LD ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ LE, LK, LT, LU and LV ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ LF, LG, LW, LX, LY and ML ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ LH and QZ ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ VQ ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ VR ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ Scheduled FY, GO, LJ, SY and YE ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ ZL ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100% PSA - 660% PSA 100% PSA - 433% PSA 100% PSA - 324% PSA 100% PSA - 295% PSA 100% PSA - 256% PSA 100% PSA - 250% PSA 85% PSA - 250% PSA 0% PSA - 406% PSA 0% PSA - 253% PSA 129% PSA - 135% PSA; 157% PSA - 193% PSA 129% PSA - 139% PSA; 148% PSA - 211% PSA TAC CO, DO, FG, LO, SG, SH, YC, YD, YJ and YK ÏÏÏÏÏÏÏ 132% PSA The initial EÅective Ranges, if calculated using the actual characteristics of the Mortgages, could diåer from those shown in the table. Even if the Mortgages were to prepay at a constant rate within the initial EÅective Range shown for any Class, but near the upper or lower end of that EÅective Range, that Class might not receive scheduled payments. Moreover, there may not be any constant prepayment rate, based on the actual characteristics of the Mortgages, at which a TAC Class would receive scheduled payments. Non-constant prepayment rates can cause any Class not to receive scheduled payments, even if such rates remain within its EÅective Range, if any, shown above. The EÅective Ranges can narrow or ""drift'' upward or downward over time. Under many scenarios the Classes shown in the table, especially the Scheduled and TAC Classes, would not receive scheduled payments. Other Classes support the principal payment stability of the PAC, Scheduled and TAC Classes, as shown below. When its supporting Classes all retire, any outstanding PAC, Scheduled or TAC Class will become more sensitive to Mortgage prepayments and its EÅective Range, if any, will no longer exist. If a Scheduled or TAC Class supports any other Classes at that time, its principal payment behavior will become similar to that of a Support Class, as described below. Classes Supporting Classes PAC ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ Scheduled ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ TAC ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ Supported by Scheduled, TAC and Support TAC and Support Support If the underlying Mortgages prepay at rates that are generally below the EÅective Range or Rate for any Class, the available principal may be insuçcient to produce scheduled payments on that Class and its weighted average life may extend, perhaps signiñcantly. If the underlying S-13

Mortgages prepay at rates that are generally above the EÅective Range or Rate for any Class, its weighted average life may shorten, perhaps signiñcantly. However, the weighted average life of any PAC, Scheduled or TAC Class could extend (or shorten) under some scenarios, including ""whipsaw'' scenarios, involving Mortgage prepayments at rates that, on average, are above (or below) its EÅective Range or Rate. We distribute all available principal monthly on each Payment Date and do not retain it for distribution on subsequent Payment Dates. As a result, the likelihood that the PAC, Scheduled and TAC Classes will receive scheduled payments will not beneñt from averaging high and low principal payments in diåerent months. Support Class The Support Class supports the principal payment stability of the PAC, Scheduled and TAC Classes as described above. As a result, the Support Class is likely to be much more sensitive to Mortgage prepayments than is any Class it supports. The Support Class may receive no principal payments for extended periods of time, and its principal payment rate may vary widely from month to month. Relatively fast Mortgage prepayments may signiñcantly shorten, and relatively slow Mortgage prepayments may signiñcantly extend, the weighted average life of the Support Class. MACR Classes The payment characteristics of the MACR Classes reöect the payment characteristics of their related REMIC Classes. Declining Balances Table The following table shows: Percentages of original balances (as of the Closing Date) that would be outstanding after each of the Payment Dates shown at various percentages of PSA. Corresponding weighted average lives. We have prepared this table using the Modeling Assumptions. However, for 0% PSA, we have assumed that each Mortgage (a) has an interest rate 2.5% higher than that of the related PCs and (b) has a remaining term to maturity of 360 months and a loan age of 0 months. We have calculated weighted average lives for each Notional Class assuming that a reduction in its notional principal amount is a reduction in principal balance. S-14

Percentages of Original Balances Outstanding* and Weighted Average Lives FY, GO, LJ, SY, CO, YC, YH and YJ DO, YD, YI and YK FG, LO, SG, SH and SI YE and YG PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption Date 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% Closing Date ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2003 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 99 93 57 100 100 100 100 100 100 100 100 98 84 93 74 70 70 70 April 15, 2004 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 98 29 0 100 100 100 100 53 100 100 99 75 34 91 71 56 56 56 April 15, 2005 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 85 0 0 100 100 100 74 0 100 100 95 48 0 90 70 43 43 8 April 15, 2006 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 71 0 0 100 100 100 43 0 100 100 90 28 0 89 69 32 32 0 April 15, 2007 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 61 0 0 100 100 100 22 0 100 100 86 14 0 88 68 22 22 0 April 15, 2008 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 54 0 0 100 100 100 8 0 100 100 84 5 0 87 67 14 14 0 April 15, 2009 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 50 0 0 100 100 100 1 0 100 100 82 1 0 86 65 8 8 0 April 15, 2010 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 48 0 0 100 100 100 0 0 100 100 81 0 0 85 64 3 2 0 April 15, 2011 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 46 0 0 100 100 100 0 0 100 100 81 0 0 83 63 0 0 0 April 15, 2012 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 39 0 0 100 100 100 0 0 100 100 78 0 0 82 59 0 0 0 April 15, 2013 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 29 0 0 100 100 100 0 0 100 100 74 0 0 81 51 0 0 0 April 15, 2014 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 16 0 0 100 100 100 0 0 100 100 70 0 0 79 41 0 0 0 April 15, 2015 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 3 0 0 100 100 100 0 0 100 100 65 0 0 77 29 0 0 0 April 15, 2016 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 0 0 0 100 100 94 0 0 100 100 60 0 0 76 15 0 0 0 April 15, 2017 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 99 0 0 0 100 100 86 0 0 100 100 55 0 0 74 0 0 0 0 April 15, 2018 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 72 0 0 0 100 100 78 0 0 100 90 50 0 0 72 0 0 0 0 April 15, 2019 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 44 0 0 0 100 100 70 0 0 100 80 45 0 0 70 0 0 0 0 April 15, 2020 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 16 0 0 0 100 100 62 0 0 100 70 40 0 0 67 0 0 0 0 April 15, 2021 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 93 55 0 0 100 60 35 0 0 65 0 0 0 0 April 15, 2022 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 77 48 0 0 100 49 31 0 0 62 0 0 0 0 April 15, 2023 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 61 41 0 0 100 39 26 0 0 60 0 0 0 0 April 15, 2024 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 45 35 0 0 100 29 22 0 0 57 0 0 0 0 April 15, 2025 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 29 29 0 0 100 19 19 0 0 54 0 0 0 0 April 15, 2026 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 13 23 0 0 100 9 15 0 0 51 0 0 0 0 April 15, 2027 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 18 0 0 100 0 12 0 0 47 0 0 0 0 April 15, 2028 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 14 0 0 100 0 9 0 0 38 0 0 0 0 April 15, 2029 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 59 0 0 0 0 100 0 10 0 0 86 0 6 0 0 0 0 0 0 0 April 15, 2030 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 70 0 6 0 0 45 0 4 0 0 0 0 0 0 0 April 15, 2031 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 2 0 3 0 0 1 0 2 0 0 0 0 0 0 0 April 15, 2032 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (Years)ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 27.1 16.8 7.5 1.7 1.1 28.3 21.7 20.2 4.0 2.1 27.9 20.0 15.7 3.2 1.7 19.5 8.6 3.0 3.0 2.0 LA LB LC LD PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption Date 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% Closing Date ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2003 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2004 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 86 9 9 9 9 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2005 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 69 0 0 0 0 100 0 0 0 0 100 92 92 92 92 100 100 100 100 100 April 15, 2006 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 50 0 0 0 0 100 0 0 0 0 100 7 7 7 0 100 100 100 100 0 April 15, 2007 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 30 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 April 15, 2008 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 8 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 April 15, 2009 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 85 0 0 0 0 100 0 0 0 0 100 0 0 0 0 April 15, 2010 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 60 0 0 0 0 100 0 0 0 0 100 0 0 0 0 April 15, 2011 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 33 0 0 0 0 100 0 0 0 0 100 0 0 0 0 April 15, 2012 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 3 0 0 0 0 100 0 0 0 0 100 0 0 0 0 April 15, 2013 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 79 0 0 0 0 100 0 0 0 0 April 15, 2014 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 53 0 0 0 0 100 0 0 0 0 April 15, 2015 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 25 0 0 0 0 100 0 0 0 0 April 15, 2016 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 92 0 0 0 0 April 15, 2017 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 39 0 0 0 0 April 15, 2018 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2019 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2020 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2021 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2022 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2023 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2024 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2025 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2026 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2027 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2028 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2029 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2030 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2031 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 April 15, 2032 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (Years)ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 4.0 1.7 1.7 1.7 1.7 8.4 2.5 2.5 2.5 2.5 12.1 3.5 3.5 3.5 3.3 14.8 4.5 4.5 4.5 3.7 * Rounded to nearest whole percentage. S-15

LF, LW, LX, LY, LE, LK, LT, LU, LV and UI MI and ML LG LH PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption Date 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% Closing Date ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2003 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2004 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2005 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2006 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 84 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2007 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 95 95 95 0 100 100 100 100 92 100 100 100 100 100 100 100 100 100 100 April 15, 2008 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 49 49 49 0 100 100 100 100 0 100 100 100 100 97 100 100 100 100 100 April 15, 2009 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 6 6 6 0 100 100 100 100 0 100 100 100 100 56 100 100 100 100 100 April 15, 2010 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 49 49 49 0 100 100 100 100 26 100 100 100 100 100 April 15, 2011 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 0 0 0 100 96 96 96 3 100 100 100 100 100 April 15, 2012 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 0 0 0 100 69 69 69 0 100 100 100 100 77 April 15, 2013 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 0 0 0 100 46 46 46 0 100 100 100 100 57 April 15, 2014 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 0 0 0 100 27 27 27 0 100 100 100 100 42 April 15, 2015 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 0 0 0 100 11 11 11 0 100 100 100 100 31 April 15, 2016 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 96 96 96 23 April 15, 2017 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 79 79 79 17 April 15, 2018 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 93 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 64 64 64 12 April 15, 2019 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 69 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 52 52 52 9 April 15, 2020 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 42 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 42 42 42 6 April 15, 2021 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 14 0 0 0 0 100 0 0 0 0 100 0 0 0 0 100 34 34 34 5 April 15, 2022 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 74 0 0 0 0 100 0 0 0 0 100 27 27 27 3 April 15, 2023 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 25 0 0 0 0 100 0 0 0 0 100 21 21 21 2 April 15, 2024 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 84 0 0 0 0 100 16 16 16 2 April 15, 2025 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 51 0 0 0 0 100 12 12 12 1 April 15, 2026 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 16 0 0 0 0 100 9 9 9 1 April 15, 2027 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 64 7 7 7 0 April 15, 2028 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 5 5 5 0 April 15, 2029 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 3 3 3 0 April 15, 2030 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 2 2 0 April 15, 2031 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 April 15, 2032 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (Years)ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 17.7 6.0 6.0 6.0 4.4 20.5 8.0 8.0 8.0 5.5 23.0 11.0 11.0 11.0 7.3 25.3 18.2 18.2 18.2 12.4 LI LZ QZ VQ PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption Date 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% Closing Date ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2003 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 106 106 78 0 0 106 106 106 106 106 91 91 91 91 91 April 15, 2004 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 97 79 79 79 79 113 113 21 0 0 113 113 113 113 113 82 82 82 82 82 April 15, 2005 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 93 50 50 50 50 120 120 0 0 0 120 120 120 120 120 73 73 73 73 73 April 15, 2006 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 89 23 23 23 0 127 127 0 0 0 127 127 127 127 127 63 63 63 63 63 April 15, 2007 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 84 0 0 0 0 135 135 0 0 0 135 135 135 135 135 52 52 52 52 52 April 15, 2008 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 79 0 0 0 0 143 143 0 0 0 143 143 143 143 143 40 40 40 40 40 April 15, 2009 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 73 0 0 0 0 152 152 0 0 0 152 152 152 152 152 28 28 28 28 28 April 15, 2010 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 67 0 0 0 0 161 161 0 0 0 161 161 161 161 161 15 15 15 15 15 April 15, 2011 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 61 0 0 0 0 171 171 0 0 0 171 171 171 171 171 1 1 1 1 1 April 15, 2012 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 54 0 0 0 0 182 182 0 0 0 182 182 182 182 176 0 0 0 0 0 April 15, 2013 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 46 0 0 0 0 193 193 0 0 0 193 193 193 193 130 0 0 0 0 0 April 15, 2014 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 38 0 0 0 0 205 205 0 0 0 205 205 205 205 96 0 0 0 0 0 April 15, 2015 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 29 0 0 0 0 218 218 0 0 0 218 218 218 218 71 0 0 0 0 0 April 15, 2016 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 19 0 0 0 0 231 231 0 0 0 228 220 220 220 52 0 0 0 0 0 April 15, 2017 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 8 0 0 0 0 245 245 0 0 0 228 180 180 180 38 0 0 0 0 0 April 15, 2018 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 261 261 0 0 0 228 146 146 146 28 0 0 0 0 0 April 15, 2019 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 277 277 0 0 0 228 119 119 119 20 0 0 0 0 0 April 15, 2020 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 294 294 0 0 0 228 96 96 96 14 0 0 0 0 0 April 15, 2021 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 312 312 0 0 0 228 77 77 77 10 0 0 0 0 0 April 15, 2022 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 331 331 0 0 0 228 61 61 61 7 0 0 0 0 0 April 15, 2023 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 351 351 0 0 0 228 48 48 48 5 0 0 0 0 0 April 15, 2024 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 373 373 0 0 0 228 37 37 37 4 0 0 0 0 0 April 15, 2025 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 396 396 0 0 0 228 28 28 28 2 0 0 0 0 0 April 15, 2026 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 421 421 0 0 0 228 21 21 21 2 0 0 0 0 0 April 15, 2027 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 446 432 0 0 0 146 15 15 15 1 0 0 0 0 0 April 15, 2028 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 474 335 0 0 0 11 11 11 11 1 0 0 0 0 0 April 15, 2029 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 503 242 0 0 0 7 7 7 7 0 0 0 0 0 0 April 15, 2030 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 534 153 0 0 0 4 4 4 4 0 0 0 0 0 0 April 15, 2031 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 567 68 0 0 0 2 2 2 2 0 0 0 0 0 0 April 15, 2032 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (Years)ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 9.9 3.1 3.1 3.1 2.8 29.6 27.3 1.5 0.6 0.3 25.3 18.2 18.2 18.2 13.2 5.0 5.0 5.0 5.0 5.0 S-16

VR ZL Group 1 Assets PSA Prepayment Assumption PSA Prepayment Assumption PSA Prepayment Assumption Date 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% 0% 100% 157% 250% 400% Closing Date ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 April 15, 2003 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 106 106 106 106 106 99 97 96 95 92 April 15, 2004 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 113 113 113 113 113 98 92 89 84 76 April 15, 2005 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 120 120 120 120 120 98 85 80 71 57 April 15, 2006 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 127 127 127 127 0 97 79 71 59 43 April 15, 2007 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 135 135 135 135 0 95 73 63 49 32 April 15, 2008 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 143 143 143 143 0 94 68 56 41 24 April 15, 2009 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 152 152 152 152 0 93 62 50 34 18 April 15, 2010 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 161 161 161 161 0 92 58 45 29 13 April 15, 2011 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 100 100 100 100 100 171 171 0 39 0 90 53 39 24 10 April 15, 2012 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 82 82 82 82 0 182 182 0 39 0 89 49 35 20 7 April 15, 2013 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 62 62 62 62 0 193 193 0 39 0 87 45 31 16 5 April 15, 2014 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 41 41 41 41 0 205 205 0 39 0 85 41 27 14 4 April 15, 2015 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 18 18 18 18 0 218 218 0 39 0 83 37 24 11 3 April 15, 2016 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 231 231 0 39 0 81 34 21 9 2 April 15, 2017 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 245 0 0 39 0 78 30 18 8 2 April 15, 2018 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 261 0 0 39 0 75 27 16 6 1 April 15, 2019 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 277 0 0 39 0 72 25 14 5 1 April 15, 2020 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 294 0 0 39 0 69 22 12 4 1 April 15, 2021 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 312 0 0 39 0 66 19 10 3 0 April 15, 2022 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 331 0 0 39 0 62 17 8 3 0 April 15, 2023 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 351 0 0 39 0 58 15 7 2 0 April 15, 2024 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 373 0 0 39 0 53 13 6 2 0 April 15, 2025 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 396 0 0 39 0 49 11 5 1 0 April 15, 2026 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 421 0 0 39 0 43 9 4 1 0 April 15, 2027 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 446 0 0 39 0 37 7 3 1 0 April 15, 2028 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 474 0 0 39 0 31 5 2 0 0 April 15, 2029 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 39 0 24 4 2 0 0 April 15, 2030 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 39 0 17 2 1 0 0 April 15, 2031 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 39 0 9 1 0 0 0 April 15, 2032 ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Weighted Average Life (Years)ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ 11.6 11.6 11.6 11.6 9.5 26.7 15.0 8.8 13.8 3.2 20.8 11.3 8.9 6.5 4.5 S-17

Yield Tables The following tables show pre-tax yields to maturity (corporate bond equivalent) of speciñed Classes at various percentages of PSA and levels of LIBOR, if applicable. We have prepared these tables using the Modeling Assumptions and the assumed prices in the table captions, plus accrued interest, if any. Actual sales will not necessarily occur at the assumed prices. Pre-Tax Yields CO Class (Assumed Price: 59.484375%) 100% PSA 157% PSA 250% PSA 400% PSA 3.1% 7.6% 33.0% 55.6% DO Class (Assumed Price: 47.5625%) 100% PSA 157% PSA 250% PSA 400% PSA 3.5% 3.8% 19.9% 39.8% GO Class (Assumed Price: 78.4375%) 129% PSA 157% PSA through through 100% PSA 135% PSA 193% PSA 250% PSA 400% PSA 3.0% 8.9% 8.9% 8.9% 13.2% LI Class (Assumed Price: 15.95%) 100% PSA through 50% PSA 295% PSA 400% PSA 442% PSA 20.8% 7.7% 2.9% 0.0% LO Class (Assumed Price: 51.81863%) 100% PSA 157% PSA 250% PSA 400% PSA 3.3% 4.6% 23.3% 44.1% MI Class (Assumed Price: 34.28125%) 100% PSA through 50% PSA 250% PSA 375% PSA 400% PSA 14.3% 8.9% 0.0% (1.9)% S-18