U.S. Treasury yields were little changed on Wednesday as investors awaited the outcome of what could be Jerome Powell's final policy meeting as Federal Reserve chair. The yield on the 10-year U.S. Treasury note — the key benchmark for U.S. government borrowing — was broadly unchanged at 4.358%. The 2-year Treasury note yield, which more closely tracks short-term Federal Reserve interest rate policy, was also flat at 3.848%. The longer-dated 30-year Treasury bond yield was little changed at 4.