U.S. Department of the Treasury

Official daily Real Constant Maturity Treasury par real yields for TIPS at 5, 7, 10, 20, and 30 years. Treasury estimates the current daily par real curve with a monotone-convex spline using bid-side prices for recently auctioned TIPS. Outputs are percent-form real par yields, not inflation rates, breakevens, spot rates, discount factors, or forecasts. Observation date and published series/method breaks must accompany historical use.

Official daily nominal Constant Maturity Treasury par yields at 1, 1.5, 2, 3, 4, and 6 months and 1, 2, 3, 5, 7, 10, 20, and 30 years. Treasury derives the current curve by a monotone-convex method from indicative bid-side prices for recently auctioned nominal securities. Outputs are percent-form par/bond-equivalent yields, not spot rates, zero-coupon rates, discount factors, APY, or forecasts. Observation date and published series/method breaks must accompany historical use.