United States - Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity was 5.21% in August of 2026, according to the United States Federal Reserve. Historically, United States - Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity reached a record high of 15.21 in October of 1981 and a record low of 0.99 in March of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity - last updated from the United States Federal Reserve on August of 2026.