U.S. Treasury yields fell slightly on Tuesday ahead of the key Federal Reserve decision on Wednesday.

The yield on the benchmark 10-year Treasury note fell 2.8 basis points to 1.544% at around 4:00 p.m. ET. The yield on the 30-year Treasury bond fell 1.1 basis points to 1.957%. Yields move inversely to prices and 1 basis point is equal to 0.01%.