30-year Treasury constant maturity series was discontinued on February 18, 2002 and currently 1, 2, 3 and 6 months and 1, 2, 3, 5, 7, 10, 20, and 30 years. of interest rates, may result in negative yields for some Treasury securities trading� TMUBMUSD30Y | A complete U.S. 30 Year Treasury Bond bond overview by MarketWatch. View the latest bond prices, bond market news and bond rates. Notes: The 30 year yield was not available for a period between 2002 and 2006 because 30 year securities were not being offered during that period. Related�