Class X Notional Amount As of any date of determination, the sum of the then Component Notional Amounts of all the Components.

Class X-A Notional Amount With respect to the Class X-A Certificates as of any date of determination, the sum of the Component Notional Amounts of the Class X-A Components.

Class X-B Notional Amount With respect to the Class X-B Certificates as of any date of determination, the sum of the Component Notional Amounts of the Class X-B Components.

Class A-X Notional Amount With respect to any Distribution Date, an amount equal to the aggregate Scheduled Principal Balance of the Non-Discount Mortgage Loans.

Class Notional Amount Not applicable.

Notional Amount With respect to any Class or Subclass of Interest Only Certificates, an amount used as the principal basis for the calculation of any interest payment amount, as more specifically defined in the Series Supplement.

Swap Notional Amount With respect to any Distribution Date is the amount set forth on Schedule II attached hereto with respect to such Distribution Date.

Component Notional Amount Not applicable.

Certificate Notional Amount With respect to any Interest Only Certificate, as of any date of determination, the then notional principal amount on which such Certificate accrues interest, equal to the product of (a) the then Certificate Factor for the Class of Interest Only Certificates to which such Certificate belongs, multiplied by (b) the amount specified on the face of such Certificate as the initial Certificate Notional Amount thereof.

Class A Interest Accrual Amount As to any Distribution Date, the sum of the Interest Accrual Amounts for the Class A Certificates with respect to such Distribution Date.

Initial Notional Amount With respect to any Class or Subclass of Interest Only Certificates, the amount initially used as the principal basis for the calculation of any interest payment amount, as more specifically defined in the Series Supplement.

Original Notional Amount With respect to the Class X-A Notional Amount and Class X-B Notional Amount, the applicable initial Notional Amount thereof as of the Closing Date, as specified in the Preliminary Statement.

Class B Interest Accrual Amount With respect to any Distribution Date, the sum of the Interest Accrual Amounts for the Classes of Class B Certificates with respect to such Distribution Date.

Class A Non-PO Optimal Amount As to any Distribution Date, the sum for such Distribution Date of (i) the Class A Interest Accrual Amount, (ii) the Aggregate Class A Unpaid Interest Shortfall and (iii) the Class A Non-PO Optimal Principal Amount.

Class A-4 Interest Distributable Amount means the amount of interest accrued during the related Interest Period (calculated on the basis of a 360 day year consisting of twelve 30 day months) on the Class A‑4 Principal Balance as of the immediately preceding Payment Date (after giving effect to payments of principal made on such immediately preceding Payment Date) at the Class A‑4 Rate or, in the case of the first Payment Date, on the Class A‑4 Initial Principal Balance.

Interest Accrual Amount As to any Distribution Date and any Class of Class A Certificates (other than the Class A-PO Certificates), (a) the product of (i) 1/12th of the Class A Pass-Through Rate for such Class and (ii) the Principal Balance of such Class as of the Determination Date preceding such Distribution Date minus (b) the Class A Interest Percentage of such Class of (i) any Non-Supported Interest Shortfall allocated to the Class A Certificates with respect to such Distribution Date, (ii) the interest portion of any Excess Special Hazard Losses, Excess Fraud Losses and Excess Bankruptcy Losses allocated to the Class A Certificates with respect to such Distribution Date pursuant to Section 4.02(e) and (iii) the interest portion of any Realized Losses (other than Excess Special Hazard Losses, Excess Fraud Losses and Excess Bankruptcy Losses) allocated to the Class A Certificates on or after the Cross-Over Date pursuant to Section 4.02(e). The Class A-PO Certificates have no Interest Accrual Amount. As to any Distribution Date and any Class of Class B Certificates, an amount equal to (i) the product of 1/12th of the Class B Pass-Through Rate and the Principal Balance of such Class as of the Determination Date preceding such Distribution Date minus (ii) the Class B Interest Percentage of such Class of (x) any Non-Supported Interest Shortfall allocated to the Class B Certificates with respect to such Distribution Date and (y) the interest portion of any Excess Special Hazard Losses, Excess Fraud Losses and Excess Bankruptcy Losses allocated to the Class B Certificates with respect to such Distribution Date pursuant to Section 4.02(e).

Preliminary Class Notional Amount With respect to each Reference Tranche, the amount which is equal to the Class Notional Amount of such Reference Tranche immediately prior to such Payment Date, after the application of the Preliminary Tranche Write-down Amount in accordance with the same priorities set forth in Section 3.03(b) hereof, and after the application of the Preliminary Tranche Write-up Amount in accordance with the same priorities set forth in the Section 3.03(c) hereof.

Class X Distributable Amount With respect to any Distribution Date, the amount of interest that has accrued on the Class X Notional Balance, as described in the Preliminary Statement, but that has not been distributed prior to such date. In addition, such amount shall include the initial Overcollateralization Amount of $10,346,197.30 ($10,346,297.30 less $100 of such amount allocated to the Class P Certificates) to the extent such amount has not been distributed on an earlier Distribution Date as part of the Overcollateralization Reduction Amount.

Class A-3 Interest Distributable Amount means the amount of interest accrued during the related Interest Period (calculated on the basis of a 360 day year consisting of twelve 30 day months) on the Class A‑3 Principal Balance as of the immediately preceding Payment Date (after giving effect to payments of principal made on such immediately preceding Payment Date) at the Class A‑3 Rate or, in the case of the first Payment Date, on the Class A‑3 Initial Principal Balance.

Class A-1 Interest Distributable Amount means the amount of interest accrued during the related Interest Period (calculated on the basis of the actual number of days in such Interest Period and a year assumed to consist of 360 days) on the Class A‑1 Principal Balance as of the immediately preceding Payment Date (after giving effect to payments of principal made on such immediately preceding Payment Date) at the Class A‑1 Rate or, in the case of the first Payment Date, on the Class A‑1 Initial Principal Balance.

Original Class B-3 Fractional Interest As to the first Distribution Date, the percentage obtained by dividing the sum of the Original Class B-4 Principal Balance, the Original Class B-5 Principal Balance and the Original Class B-6 Principal Balance by the sum of the Original Class A Non-PO Principal Balance and the Original Class B Principal Balance. The Original Class B-3 Fractional Interest is specified in Section 11.18.

Accrual Amount With respect to any Class of Accrual Certificates and any Distribution Date prior to the Accrual Termination Date, the amount allocable to interest on such Class of Accrual Certificates with respect to such Distribution Date pursuant to Section 4.02(a)(ii).

Original Class B-2 Fractional Interest As to the first Distribution Date, the percentage obtained by dividing the sum of the Original Class B-3 Principal Balance, the Original Class B-4 Principal Balance, Original Class B-5 Principal Balance and the Original Class B-6 Principal Balance by the sum of the Original Class A Non-PO Principal Balance and the Original Class B Principal Balance. The Original Class B-2 Fractional Interest is specified in Section 11.17.

Original Class B-1 Fractional Interest As to the first Distribution Date, the percentage obtained by dividing the sum of the Original Class B-2 Principal Balance, the Original Class B-3 Principal Balance, the Original Class B-4 Principal Balance, Original Class B-5 Principal Balance and the Original Class B-6 Principal Balance by the sum of the Original Class A Non-PO Principal Balance and the Original Class B Principal Balance. The Original Class B-1 Fractional Interest is specified in Section 11.16.

Certificate Interest Distributable Amount means, with respect to any Payment Date, the sum of the Certificate Monthly Interest Distributable Amount for such Payment Date and the Certificate Interest Carryover Shortfall for such Payment Date.