Guolian Minsheng Securities suggests that the Treasury's announcement, timed the day after the 30-year yield hit a fresh high, is more likely aimed at reinforcing market expectations regarding long-end supply and demand rather than directly altering the outcome of any single auction. The net effect is expected to be asymmetric, with an expanded buyback program likely unable to halt the rise in the term premium's central tendency, while the corresponding decline in yields bought by the buybacks will progressively diminish. The cost and efficacy of these operations may both hinge on the premise that the Federal Reserve will respond with tacit agreement by choosing to remain on hold.
The U.S. Treasury stepped in at a vulnerable moment for the long end, using debt management tools to effectively alleviate further upward pressure on long-term interest rates. On the morning of August 19, Eastern Time, the Treasury announced it would double the size of its liquidity support buyback operations for nominal coupon securities with maturities of 10-20 years and 20-30 years, raising the single-operation cap from $2 billion to no less than $4 billion. The program is set to take effect on September 9 and will run through the end of the current refunding quarter on November 4. Market reaction was swift, with yields on 10-year and 30-year Treasuries declining and U.S. stock futures moving higher in tandem.
Compared to the scale of this intervention, the timing is more critical. Having just published the quarterly buyback schedule two weeks prior, this incremental announcement reflects an off-schedule adjustment driven by market conditions. In overnight trading on August 18, the 30-year yield briefly touched its highest level in nearly 19 years; the August 13 auction of $25 billion in 30-year bonds saw a high yield of 5.216%, the highest since 2001, following a 10-year auction the previous day that also set a record not seen since 2007.
The core of these operations lies in duration swapping. The cash requirements for the buybacks are covered by the Treasury's regular issuance program, with the focus on executing a "sell short, buy long" duration swap. This fundamentally differs from the Federal Reserve's Reserve Management Purchases (RMP): RMP buys short-dated securities under one year to replenish bank reserves and serves as a quantity-based tool. In contrast, Treasury buybacks do not involve money creation or balance sheet expansion, making them a structural tool.
For the market, the signaling effect outweighs the immediate impact. Between September 9 and November 4, there will be a total of seven long-end operations affected by the new policy, with the cap rising from $14 billion to no less than $28 billion. However, the incremental scale is difficult to realize in both immediate and aggregate terms. On one hand, against the backdrop of monthly coupon supply exceeding $100 billion, the scale does not change the total debt level and serves more to enhance auction bidder appetite. On the other hand, the first operation after the expansion is scheduled for September 10, providing no mechanical support for late-August auctions. The Treasury's announcement, coming the day after the 30-year yield hit a record high, is more likely designed to strengthen market expectations on long-end supply and demand rather than to directly alter the outcome of any single auction.
The real highlight is the shifting boundary between fiscal and monetary functions. Constrained by inflation and political considerations, the Federal Reserve is unlikely to restart quantitative easing in the short term and lacks the room to purchase long-dated bonds. Meanwhile, the Treasury, through its issuance maturity structure and buybacks, is effectively assuming part of the yield curve management function. In the near term, this is an effective technical arrangement introduced at a time of rapid increases in long-end yields. For the medium term, however, the impact may fall short of expectations: Treasury support compresses the term premium, while the uncertainty brought by policy discretion raises it. The net effect will be asymmetric—expanding buybacks will likely fail to prevent the term premium's central tendency from rising, and the yield decline achievable through buybacks will correspondingly diminish.
Looking further, these operations imply a certain tacit understanding between fiscal and monetary authorities. The funds for buying long-dated bonds are covered by issuing short-dated securities. If the Fed were to hike rates in September, the Treasury's short-end financing costs would immediately rise, and higher policy rates would push the long end up as well, potentially widening the term premium again. The cost and effectiveness of these operations may both be built on the premise that the Fed will respond with tacit cooperation by staying put. For the monetary policy side, the impact of this move is neutral-to-positive, but perhaps contrary to market intuition: these operations do not create room for the Fed to cut rates—they merely temporarily decouple long-end pricing from the policy path. Going forward, the key observation points are the Jackson Hole symposium at the end of August and the August economic data released ahead of the September FOMC meeting.
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