Off-the-run Treasuries are seasoned U.S. Treasury issues that are no longer the newest benchmark securities in their maturity sectors.
Off-the-run Treasuries are U.S. Treasury securities that are no longer the most recently issued securities in their maturity sectors. The newest benchmark issue is called on-the-run. When Treasury sells a newer issue for that sector, the prior benchmark becomes off-the-run.
“Off-the-run” describes issuance status, not credit quality. Both on-the-run and off-the-run securities are Treasury obligations, but they can differ in maturity, coupon, duration, trading activity, financing demand, available supply, and market price.
Suppose Treasury issues a new 10-year note. That note becomes the on-the-run 10-year benchmark, and the previously newest 10-year note becomes a recent off-the-run issue. As more 10-year notes are issued, older securities move deeper into the off-the-run population.
The comparison is not exact because the securities age between auctions. The prior note has a shorter remaining maturity, a potentially different coupon, and different accrued interest. A simple yield spread therefore mixes several effects.
Market participants sometimes use near off-the-run for recently superseded issues and deep off-the-run for older seasoned securities. These are market descriptions rather than separate Treasury product types.
| Feature | On-the-run Treasury | Off-the-run Treasury |
|---|---|---|
| Issuance status | Newest issue in its sector | Older issue in the sector |
| Remaining maturity | Closest to the benchmark tenor at issuance | Shorter and increasingly different over time |
| Coupon | Current issue’s coupon | Often differs from the current issue |
| Trading activity | Often concentrated and high | Distributed across many CUSIPs |
| Bid-ask spread | Often narrower in normal markets | Can be wider, especially for deep issues |
| Financing demand | May receive special repo or hedging demand | Varies by issue and deliverability |
| Yield relationship | Can trade at a premium | May yield more, but not universally |
Benchmark securities attract trading, hedging, relative-value, derivatives, and price-discovery activity. Dealers and electronic venues may quote them more continuously. Concentrated activity can support smaller transaction costs and deeper visible markets.
Off-the-run trading is spread across many more CUSIPs. Some issues still trade actively because of their remaining maturity, coupon, futures-delivery status, collateral value, or investor demand. Others may require a dealer to warehouse more position risk, producing a wider spread or less depth.
Liquidity can deteriorate across both groups during market stress. The on-the-run label is therefore not a promise that any trade can be completed immediately at a displayed price.
Assume a current 10-year note yields 4.00% and a seasoned note with 9 years and 8 months remaining yields 4.08%. The observed spread is 0.08 percentage point, or 8 basis points.
It would be tempting to label all 8 basis points a liquidity premium. That conclusion is too strong because the securities have different coupons, remaining maturities, durations, accrued interest, supply, financing value, and tax lots.
If the seasoned note has an approximate duration of 8, an 8-basis-point yield difference corresponds to roughly 0.64% of price under a simple duration estimate:
Approximate price difference = 8 x 0.0008 = 0.0064, or 0.64%
The estimate is not an attribution. It only translates a yield difference into an approximate price scale while holding other factors constant. A proper relative-value comparison prices each cash flow on a common curve and separately considers liquidity and financing.
This article is educational and does not recommend an on-the-run or off-the-run security or a relative-value trade.