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ARM Index Rates: Libor Rates, Prime Rate and Other Leading Interest Rate Indexes

If you have an Adjustable Rate Mortgage, your ARM is tied to an index which governs changes in your loan's interest rate and, thus, your payments. This page lists historic values of major ARM indexes used by mortgage lenders and servicers. For the latest values of many of these indexes, click here.

ARM holders can use these ARM indexes with our ARM Check Kit™ to verify the interest rate adjustments on most types of ARMs.

Lenders and servicers can access the latest ARM indexes on a daily basis via e-mail or via our web service.

HSH also offers a wide variety of mortgage statistics. Click here for more information.

Daily US & International Rates - Last update: 10/20/2014

Latest Yesterday Week Ago
Federal Funds Rate 0.09% 0.09% 0.09%
Discount Rate 0.75% 0.75% 0.75%
Overnight Libor (1 day delay) 0.09% 0.09% 0.09%
Fannie Mae 30/60 3.54% 3.54% 3.61%
6 Month Libor (1 day delay) 0.32% 0.32% 0.32%
10 Year Treasury Security 2.17% 2.15% 2.43%
The Prime Rate 3.25% 3.25% 3.25%

Source: ARMindexes.com

Historical Data by Index

Index Treasury Bills and SecuritiesYear
3 & 6 Month Treasury Bills and 1, 3, 5 year Treasury Constant Maturity Series 1970-1979 1980-1989 1990-1999 2000-2009 2010-on
3 & 6 Month Treasury
Constant Maturity Series
1982-2000 (historical)
2- through 30-Year Treasury
Constant Maturity Series
1970-1979 1980-1989 1990-1999 2000-2009 2010-on
MTA (12-MAT) 1990-1999 2000-2009 2010-on
Other Indexes
11th District COF 1980-1989 1990-1999 2000-2009 2010-on
Monthly Median Annualized COF 1990-1999 2000-2009 2010-on
Federal Cost of Funds (FedCof) 2010-on
National Mortgage Contract Rate 1980-1989 1990-1999 2000-2009 2010-on
6-Month Secondary Market CD Rates 1960-1969 1970-1979 1980-1989 1990-1999 2000-2009 2010-on
HSH Libor (replaces FNMA Libor) 2000-2009 2010-on
Fannie Mae Libor
(discontinued)
1990-1999 2000-on
Cost of Deposit Index (CODI) 1990-1999 2000-2009 2010-on
WSJ Prime Rate 1970-1979 1980-1989 1990-1999 2000-on
ARM Conversion factors Fannie Mae Freddie Mac

HSH strives to provide reliable, useful information, but does not guarantee that the information above is accurate.

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About HSH Data

HSH Associates, Financial Publishers, is the nation's largest publisher of mortgage information. We contact mortgage lenders across the country every week to collect their latest loan offerings.

Wall Street firms, secondary marketers, and others commission HSH to conduct surveys on varied aspects of financial products and services, including wholesale rates; fees; commitment periods; and more. Please see our catalog for industry professionals . Homebuyers and refinancers use our services to shop for the best mortgage for their needs -- please see our consumer catalog.

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