Macro Note 02
Treasury yield screens look precise, but the U.S. Treasury's own documentation makes clear that constant-maturity rates are read from a curve and do not always match the exact yield on a specific security.
Why this note matters
Treasury yields are essential context for equity investors, but the cleanest-looking rate on the screen is often a model-based point on a curve, not a one-line forecast about the economy.
Treasury's FAQ says constant-maturity Treasury yields are read directly from the Treasury's daily par yield curve. That means the familiar 2-year, 5-year, or 10-year reference on a market screen can represent a point read from the curve rather than the exact yield on one specific bond.
That distinction matters because investors often speak about benchmark yields as if they were one physical object. Treasury's own documentation is more careful: the benchmark is a standardized point on a curve built from Treasury market data.
Treasury's FAQ says longer maturities can sometimes yield less than shorter maturities because the curve reflects actual bond-market activity, investor beliefs about future interest rates, and monetary policy that may be actively pursued by the Federal Reserve.
That is a useful reminder against overconfidence. An inversion is a market configuration, not a self-contained explanation. It still needs macro context, policy context, and risk context.
Treasury also states that par-yield and CMT rates indicate what rates were in the past and what they are now, and it warns that attempts to forecast future rates are risky. That is a useful guardrail for market commentary.
A disciplined investor can still use Treasury yields every day. The point is to treat them as market information and policy-sensitive context, not as official forecasts embedded by the government in one neat number.
The U.S. Treasury explains how it derives the official daily par yield curve and notes that the monotone convex method replaced the prior methodology in December 2021.
Open sourceTreasury's FAQ explains what CMT rates are, why they can differ from actual security yields, how inversions can happen, and why Treasury does not present these rates as forecasts.
Open source