SIFMA Research reported that the value of outstanding U.S. fixed income securities (Treasuries, corporate bonds, municipal bonds, agency securities, and commercial paper) totaled $50.5 trillion in Q1’26, an increase of 6.4% year-over-year. U.S. Treasuries were the largest asset class by amount outstanding, increasing by 7.9% year-over-year to $30.8 trillion. Corporate bonds outstanding totaled $11.7 trillion, up 3.0% year-over-year.