SIFMA Research reported that the value of outstanding U.S. fixed-income securities (Treasuries, corporate bonds, municipal bonds, agency securities, and commercial paper) totaled $51.4 trillion in Q2’26, an increase of 7.0% year-over-year. U.S. Treasuries were the largest asset class by amount outstanding, increasing 8.5% over the same period to $31.1 trillion. Corporate bonds outstanding totaled $12.1 trillion, up 4.2%.