On-the-Run vs. Off-the-Run

What Are On-the-Run and Off-the-Run Treasuries?

On-the-run Treasuries are the most recently auctioned U.S. government securities at each standard maturity point. They serve as the benchmark issues for their respective maturities and enjoy the highest trading volume and liquidity in the Treasury market. Off-the-run Treasuries are all previously issued securities that have been superseded by a newer auction.

When the Treasury auctions a new 10-year note, that note becomes the on-the-run 10-year benchmark. The previous benchmark, which might have 9 years and 11 months to maturity, becomes off-the-run. Despite being nearly identical in credit quality and maturity, they trade at different yields due to liquidity differences.

Why It Matters for Markets

The on-the-run/off-the-run dynamic is one of the most important liquidity phenomena in global finance. The liquidity premium embedded in on-the-run Treasuries reveals how much the market values the ability to trade quickly and in size. During normal times, this premium is modest (a few basis points). During crises, it can widen dramatically as investors stampede toward the most liquid assets.

The on-the-run 10-year Treasury yield is the benchmark that drives mortgage rates, corporate bond pricing, and global risk-free rate calculations. When financial media reports "the 10-year yield," they mean the on-the-run 10-year. Off-the-run issues, while less liquid, often represent better value for buy-and-hold investors who do not need immediate liquidity.

The on-the-run premium also affects the yield curve's shape. Because on-the-run issues trade richer than off-the-run issues, the benchmark yield curve can look different from a curve constructed with off-the-run yields. Fixed-income analysts must be aware of this distinction when building models.

The On-the-Run/Off-the-Run Trade

This spread is a classic relative value trade in government bond markets. Traders typically go long the cheap off-the-run issue and short the rich on-the-run issue, capturing the spread as it converges. The trade has a strong fundamental basis because the on-the-run premium is temporary, dissipating as the next auction creates a new benchmark.

However, the trade carries significant risk. During liquidity crises, the spread can widen sharply before narrowing, creating mark-to-market losses. Leverage amplifies both the potential return and the risk, as demonstrated by the LTCM collapse in 1998. The trade is now commonly used by hedge funds and proprietary trading desks, with risk management controls that reflect lessons from past blow-ups.