And the Treasury apparently noticed. On August 19, the department announced it would at least double the size of its future liquidity support buyback operations for longer-term nominal coupons, raising the minimum purchase threshold from $2 billion to $4 billion per operation starting September 9.
What the buyback program actually does
Treasury buybacks are not new issuance. They don’t add to the national debt or change fiscal policy. Think of them as the government going to a used car lot it already owns, buying back some of the older models to keep the lot organized and the prices fair.
In practice, the Treasury purchases “off-the-run” securities, meaning bonds that were issued in prior auctions and now trade with less liquidity than the newest, “on-the-run” issues. When these older securities become harder to trade, bid-ask spreads widen and market functioning suffers. The buyback program exists to prevent that from happening.
The operation targeting 2029-2031 maturities sits squarely in the intermediate-to-long portion of the yield curve. By concentrating purchases there, the Treasury is providing direct support to a segment of the market where liquidity can thin out as newer issuances attract the bulk of trading volume.
