6th
Constant Maturity Treasury Rates
MoneyCafe defines the 1 Year Constant Maturity Treasury Rate (CMT) as follows:
This index is an average yield on United States Treasury securities adjusted to a constant maturity of 1 year, as made available by the Federal Reserve Board. Yields are interpolated by the United States Treasury from the daily yield curve. This curve, which relates the yield on a security to its time to maturity, is based on the closing market bid yields on actively traded Treasury securities in the over-the-counter market.
(Note: This rate is updated after the Federal Reserve releases its data on the first Monday of each month.)
Bankrate.com has weekly quotes of the 1, 5, 10 and more Constant Maturity Treasury Rate info. Plus, The Federal Reserve has historical data on the rates.