Factor File A “Additional” Layout 

Ginnie II Pools – One Record per Pool

Item Data Item Begin End Type Length Remarks

1 Pool ID 1 6 Character 6 X(6)

2 Pool Indicator 7 7 Character 1 X

3 Issuer Number 8 11 Character 4 X(4)

4 Filler 12 12 Character 1 X

5 Issuer Name 13 72 Character 60 X(60)

6 Original Aggregate Amount 73 87 Numeric 15 9(13)V9(2)

7 Remaining Security RPB 88 102 Numeric 15 9(13)V9(2)

8 RPB Factor 103 111 Numeric 9 9(1)V9(8)

9 Pool Interest Rate 112 116 Numeric 5 9(2)V9(3)

10 Pool Type 117 118 Character 2 X(2)

11 Pool Issue Date (MMDDYY) 119 124 Numeric 6 9(6)

12 Pool Maturity Date (MMDDYY) 125 130 Numeric 6 9(6)

13 Factor Security Margin 131 134 Numeric 4 9(1)V9(3)

14 Interest Adjustment Date (MMDDYY) 135 140 Numeric 6 9(6)

15 Original Interest Rate 141 145 Numeric 5 9(2)V9(3)

16 Prospective Interest Rate 146 150 Numeric 5 9(2)V9(3)

17 Index Reference Date (MMDDYY) 151 156 Numeric 6 9(6)

18 Payment Adjustment Date (MMDDYY) 157 162 Numeric 6 9(6)

19 CUSIP Number 163 171 Character 9 X(9)

20 Filler 172 172 Character 1 X

21 Factor Percentage Complete 173 178 Numeric 6 9(2)V9(4)

Length of Record 178

1. Pool Number: The Pool ID is a six-character unique identifier for the Ginnie Mae pool; the file 

includes both MBS and HMBS Pool IDs. If the pool is a Multiple Issuer Pool, this is the Pool ID

of the Multiple Issuer Pool.

2. Pool Indicator: A one-character value identifying the Issue Type of the given pool. (X, C, H, or

M)

3. Issuer Number: A four-digit number which identifies the Ginnie Mae issuer associated with the 

pool.

4. Filler: Reserved for future use.

5. Issuer Name: The name of the Ginnie Mae issuer associated with the pool.

6. Original Aggregate Amount: The principal balance of the security at issuance.

7. Remaining Security RPB: The remaining principal balance on the security.

8. RPB Factor: The proportion of the Remaining Security RPB to the Original Aggregate Amount. 

Calculated by dividing Field 7 by Field 6.
9. Pool Interest Rate: The interest rate of the security. 

10. Pool Type: A two-character value identifying the type for the given pool, such as “SF” for

Single-Family, “AR” for 1-year Adjustable-Rate, or “ML” for HECM Monthly Adjustable ARM.

11. Pool Issue Date: The Ginnie Mae issue date of the pool. The issue date is always the first of the 

month.

12. Pool Maturity Date: The scheduled date on which the last payment in the pool may be paid.

13. Factor Security Margin: Applies to ARM Pools only. The margin used to adjust the security

rate.

14. Interest Adjustment Date: Applies to ARM Pools only. The date that the security interest rate 

changes.

15. Original Interest Rate: The interest rate of the security at issuance.

16. Prospective Interest Rate: Applies to ARM Pools only. The interest rate of the next adjustment

to the security. 

17. Index Reference Date: Applies to ARM Pools only. The date of the index rate used in 

determining the interest rate adjustment for the security.

18. Payment Adjustment Date: Applies to ARM Pools only. The payment date on which the 

adjusted security interest rate applies.

19. CUSIP Number: The CUSIP number is a unique, nine-character identification number

permanently assigned by the Committee on Uniform Securities Identification Procedures to each 

publicly traded security at the time of issuance.

20. Filler: Reserved for future use. 

21. Factor Percentage Complete: Applies to Multiple Issuer Pools (MIP) only. For non-MIP pools

and fully-reported MIP pools, this field will be blank. The percentage of a Multiple Issuer Pool 

(MIP) reported. For new originations MIP pools, the Factor Percentage Complete is the reported 

RPB/OAA (Field 6). For other (non-new originations) MIP pools, the Factor Percentage 

Complete is the reported RPB/MIP Prior Month RPB.

Example: If no Security RPB on a MIP is reported, Field 7 and 8 would be blank and 

Field 21 would be 00.0000