Daily par yield for 10-year U.S. Treasury securities, from the Treasury's official daily par yield curve.
1990–2026 · 9,195 observationsSource: U.S. Treasury — Daily Par Yield Curve
Par yields are interpolated by the U.S. Treasury from the closing market bid prices on the most recently auctioned securities. Values are published each business day and ingested from the Treasury's yearly CSV files; revisions replace prior vintages, which remain queryable.