1. As of March 1, 2016, the daily effective federal funds rate (EFFR) is a The 30- year Treasury constant maturity series was discontinued on February 18, 2002, and Note: Current and historical H.15 data, along with weekly, monthly, and� 1 Year Constant Maturity Treasury (CMT Rate) - Current Rate, Historical Table, Rate Chart, Definition - What is the 1 Year CMT Index? Interactive chart showing the daily 1 year treasury yield back to 1962. yield of a range of Treasury securities, all adjusted to the equivalent of a one-year maturity.