Monthly Interest Rate Survey (MIRS)

The survey provides monthly information on interest rates, loan terms, and house prices by property type (all, new, previously occupied), by loan type (fixed- or adjustable-rate), and by lender type (savings associations, mortgage companies, commercial banks, and savings banks), as well as information on 15-year and 30-year fixed-rat​​e loans.  In addition, the survey provides quarterly information on conventional loans by major metropolitan area and by Federal Home Loan Bank district.

Each month, FHFA samples savings institutions, commercial banks, and mortgage loan companies, and asks them to report the terms and conditions on all single-family, fully amortized, purchase-money, nonfarm loans that they close during the last five business days of the month.  The survey excludes FHA-insured and VA-guaranteed loans, multifamily loans, mobile home loans, and loans created by refinancing another mortgage.  In most cases, the information is reported electronicall​​y in a format that is similar to that used on FHFA Form # 075, which FHFA also accepts.  FHFA tabulates the data and publishes standard data tables late in the following month. 

FHFA will release August index values Thursday, September 27, 2018.

Adjustable Rate Mortgage (ARM) Index

The data, tabulated and published as described above, is used to compile FHFA’s monthly adjustable-rate mortgage index entitled the “National Average Contract Mortgage Rate for the Purchase of Previously Occupied Homes by Combined Lenders.”  This index is the successor to the index previously maintained by the former Federal Home Loan Bank Board.   

Historical Summary Tables

The following tables present historical summary data prior to 2008 containing Rates and Terms on Conventional Single-Family Non-farm Mortgage Loans. This survey is the nation's most comprehensive source of information on conventional mortgage rates and terms.

Complete History of the Index ​​​