The title is my question. I think the answer is yes, but I am unsure about it.


No, generally this will not be the case. The yields of the on-the-run treasuries for specific tenors are collected and a cubic spline is fit to these points. Thus, the yields will only match for the on-the-run 1m, 3m, 6m, 12m, 2y, 3y, 5y, 7y, 10y, and 30y treasuries.

For details please see the page on Treasury Yield Curve Methodology.

The Treasury's yield curve is derived using a quasi-cubic hermite spline function. Our inputs are the Close of Business (COB) bid yields for the on-the-run securities. Because the on-the-run securities typically trade close to par, those securities are designated as the knot points in the quasi-cubic hermite spline algorithm and the resulting yield curve is considered a par curve.


More specifically, the current inputs are the most recently auctioned 4-, 13-, 26-, and 52-week bills, plus the most recently auctioned 2-, 3-, 5-, 7-, and 10-year notes and the most recently auctioned 30-year bond, plus the composite rate in the 20-year maturity range. The quotes for these securities are obtained at or near the 3:30 PM close each trading day. The inputs for the four bills are their bond equivalent yields.

  • $\begingroup$ If I understand what you said correctly, a hypothetical on-the-run zero coupon treasury would have a yield to maturity that matched the yield curve for it's maturity. But generally, there wouldn't be a treasury for every maturity on the curve? $\endgroup$ Apr 6 '17 at 18:02
  • $\begingroup$ Yes and yes. I will update my answer to provide more details. $\endgroup$
    – msitt
    Apr 6 '17 at 18:21
  • $\begingroup$ @GeorgeWolfe When the yield curve is upward sloping, the zero coupon yield will always be higher than the par yield of the same tenor; converse is true when the yield curve is downward sloping. Only time that zero coupon yield = par yield is when the yield curve is perfectly flat. $\endgroup$
    – Helin
    Apr 6 '17 at 19:08

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