Ginnie Mae MBS Preliminary MIP File Version 1.0

Version 1.0 02/01/2016 1 Ginnie Mae MBS Preliminary MIP Disclosure 

Ginnie Mae MBS Preliminary Issuance MIP File 

This file provides information about prospective Multiple Issuer Pools, as they are formed 

throughout the Issue Month. 

The information is basically a “flow” snapshot of the MIP pools composition as it is formed 

up to the end of month MIP finalization. The file only provides information about pools 

formed in the issue month. 
Ginnie Mae MBS Preliminary MIP File Version 1.0

Version 1.0 02/01/2016 2 Ginnie Mae MBS Preliminary MIP Disclosure 

Ginnie Mae MBS Preliminary Issuance MIP File 

Summary of the Record Types in the File. All records/fields are fixed length.

Organization of Records within the File: By Record (15-Year MIP Records, then 30-Year 

MIP Records, then Adjustable Rate MIP (ARM) Records). Each set of records (15 year, 30 

year, ARM) has individual Header and Trailer records.

Short Description Occurs in the File

Record Header Three records per file

Preliminary MIP Data Record One record per Preliminary Multiple Issuer Pool

Record Trailer Three records per file

FILE LAYOUT DETAILS: 

(1) This is a daily disclosure file. The file name is “MIPPrelim.txt”.

(2) Preliminary MIP data in this file is updated based on activity (see the Multiple Issuer Pool 

Numbers PDF files) and is current as of the “Record Update Date” in the individual Header 

Records.

Note: MIP Pooling activity determines which MIP Pool records are in the layout. If there 

has been no pooling activity (e.g. no MIP pooling activity for 30 year, 4% MIP), there will 

not be a Preliminary MIP Record in the file. If there is no pooling activity for an entire set of 

records, e.g. no pooling activity for 15 year fixed, then only the Header Record and the 

Trailer Record for that record set is provided. It is possible in certain disclosure files that no 

Preliminary MIP Records are disclosed (ie. only headers/trailers for all three record sets).

(3) The record order of records in the file is as follows:

a. 15 Year, 1

st set of records; and Header and Trailer for 15 yr.

b. 30 Year, 2

nd set of records; and Header and Trailer for 30 yr.

c. Adjustable Rate, 3rd set of records; and Header and Trailer for ARM.

(4)This same record format is used for each record. The “Record Name” field in the Header 

Record indicates if the record is a 15 Year, 30 Year, or Adjustable Rate set of records.

(5) All records/fields are fixed length.

(6) MIP Finalization for a month occurs on the 5th Business Day before the first of the next 

month and will be reflected in the MIPPrelim.txt file published on the next Business Day.
Ginnie Mae MBS Preliminary MIP File Version 1.0

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Header Record

Item Data Item Begin End Type Length Remarks

1

Record Name 

(//HAGMIC.WEB.RPTXX.FILEZZ)

1 33 Character 33 X(33)

2 Record Update Date (CCYYMMDD) 34 41 Numeric 8 9(8)

3 Filler 42 42 Character 1 X

4 Record Type 43 45 Character 3 X(3)

5 Filler 46 46 Character 1 X

6 Year/Month of Data (CCYY-MM) 47 53 Character 7 X(7)

Length of Record 53

1. Record Name: “//HAGMIC.WEB.RPTXX.FILEZZ” where “XX” is “15” for 15-Year, “30” for 30-Year, or “ARM”

for Adjustable Rate and where “ZZ” is “.M” for a MIP Finalization Record and blank when not a MIP 

Finalization Record. This field contains blanks to the right.

2. Record Update Date: The date of the Preliminary MIP Data for the record. Format is CCYYMMDD. This 

date is record-specific and will be updated as record data is updated. This date will reflect the date on 

which the Preliminary MIP Data Records are updated, so the Record Update Date in one record can differ

from the Record Update Date in another record.

3. Filler: Always blank.

4. Record Type: “15” for 15 Year, “30” for 30 Year, or “ARM” for Adjustable Rate.

5. Filler: Always blank.

6. Year/Month of Data: The year and month of the data in the record. Format is CCYY-MM, where “CCYY” is 

the year, “-” is constant, and “MM” is the month. In the disclosure file following Finalization of Multiple 

Issuer Pools, the next month’s Year/Month value will be disclosed.

Preliminary MIP Data Record

All Active Multiple Issuer Pools -- One Record per MIP Pool

Item Data Item Begin End Type Length Remarks

1 CUSIP Number 1 9 Character 9 X(9)

2 MIP Pool ID 10 15 Character 6 X(6)

3 Pool Type 16 17 Character 2 X(2)

4 Filler 18 18 Character 1 X

5 Security Interest Rate 19 23 Numeric 5 9(2)v9(3)

6 Pool Term 24 25 Numeric 2 9(2)

7 Initial Pay Date (MMDDCCYY) 26 33 Numeric 8 9(8)

8 Security Margin 34 38 Numeric 4 9(1)v9(3)

9 Total Amount 38 52 Numeric 15 9(13)v9(2)

10 Total Number of Mortgages (Loans) 53 58 Numeric 6 9(6)

11 Total Number of Loan Packages 59 63 Numeric 5 9(5)

Length of Record 63

1. CUSIP Number: A nine character unique identifier for the MBS security for the pool.

2. MIP Pool ID: The Ginnie Mae Pool identifier; the number assigned by Ginnie Mae at pooling to the pool.

3. Pool Type: The pool type of the Multiple Issuer Pool.

4. Filler: Always blank.

5. Security Interest Rate: The security interest rate of the Multiple Issuer Pool.

6. Pool Term: The nominal term in years of the Multiple Issuer Pool.
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7. Initial Pay Date: The date of initial payment on the security related to the Multiple Issuer Pool.

8. Security Margin: The security margin for the Multiple Issuer Pool. This field applies only to Adjustable 

Rate Multiple Issuer Pools.

9. Total Amount: The principal amount in the Multiple Issuer Pool. This will change throughout the month 

based on MIP pooling activity. At finalization this amount will become the Original Aggregate Amount 

(OAA).

10. Total Number of Mortgages (Loans): The number of loans in the Multiple Issuer Pool. This will change 

throughout the month based on MIP pooling activity.

11. Total Number of Loan Packages: The number of loan packages in the Multiple Issuer Pool. This will 

change throughout the month based on MIP pooling activity.

Record Trailer

Item Data Item Begin End Type Length Remarks

1 Record Name (//T) 1 3 Character 3 X(3)

2 Count of Preliminary Data Records 4 18 Numeric 15 9(15)

Length of Record 18

1. Record Name: “//T” 

2. Count of Preliminary Data Records: The number of pools contained in the preliminary data record. This 

field contains leading zeroes to the left.