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ARM Index Rates: Treasuries, Libor Rates, Prime Rate and other common ARM 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. Check the latest values of many of these indexes.

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

HSH also offers a wide variety of mortgage statistics.

Daily US & International Rates - Last update: 04/22/2019

LatestYesterdayWeek Ago
Federal Funds Rate2.42%2.41%2.41%
Discount Rate3.00%3.00%3.00%
Overnight Libor (1 day delay)2.39%2.39%2.39%
Fannie Mae 30/603.85%3.87%3.76%
6 Month Libor (1 day delay)2.63%2.63%2.63%
10 Year Treasury Security2.59%2.60%2.52%
The Prime Rate5.50%5.50%5.50%

Source: ARMindexes.com

Historical Data by Index

Treasury Securities / Treasury Constant Maturities (TCM)Display
1, 3, 5 year Treasury Constant Maturity
Weekly Data Series
Graph and data table1985-current
2, 7, 10, 20 and 30-year Constant Maturity
Weekly Data Series
Graph and data table1985-current
1, 3, 5 year Treasury Constant Maturity
Monthly Data Series
Graph and data table1985-current
2, 7, 10, 20 and 30-year Constant Maturity
Monthly Data Series
Graph and data table1985-current
MTA - Moving Treasury Average
(aka 12-MAT)
Graph and data table1991-current
Other Indexes
11th District Cost of FundsGraph and data table1981-current
Monthly Median Annualized COF
Graph and data table1991-2011
Federal Cost of Funds (FedCof)Graph and data table1985-current
National Mortgage Contract RateGraph and data table1980-current
6-Month Secondary Market CD Rates
Graph and data table1985-2013
HSH Libor (replaces FNMA Libor)Graph and data table2000-current
Fannie Mae Libor
Graph and data table1990-2007
Cost of Deposits Index (CODI)
Graph and data table1985-2013
WSJ Prime RateTables of data1975-current
ARM Conversion factors - Fannie Mae and Freddie Mac RNYDiscussion and linkGSE RNY
Federal Funds RateGraph and data table2004-current

About HSH Data

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

Wall Street firms, secondary marketers, and others commissioned HSH to conduct surveys on varied aspects of financial products and services, including wholesale rates; fees; commitment periods; and more. Today, we're leading consumer resource for all things mortgage.

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

You may display the HSH rates data on your websites, provided that you (a) display the data as-is and without any modifications, (b) attribute the data to HSH.com as the source, and (c) include a live link to HSH.com. We reserve the right to require you to remove the data and link at any time in the event that we determine that your use damages or may damage our reputation.

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