Following US Treasury Secretary Scott Bessent's announcement to at least double long-term Treasury buybacks to $4 billion, the dollar index tumbled to its lowest level since mid-May. Hedge funds are now adding to dollar short positions at the fastest pace this year, awaiting further details of Bessent's fiscal plans to assess the long-term forex impact of this "quasi-quantitative easing" policy.

Over the past week, both spot and options markets have flashed strong bearish signals. Torsten Schoeneborn, co-head of G10 FX trading at Barclays in London, noted: "We've particularly seen hedge fund clients make significant moves in linear products, with dollar selling accelerating amid sustained dollar supply throughout August." Meanwhile, a gauge measuring put option premiums has climbed to its highest level since February, with the dollar index hitting three-month lows and emerging as the primary casualty of Bessent's bond market intervention.

The "Quasi-QE" Gamble: The Maginot Line at 5% Yields

On August 19, one day after 30-year Treasury yields hit 5.33%—their highest since 2007—Bessent announced a decision that stunned Wall Street: raising the maximum size of liquidity support repurchase operations for 10-to-30-year long-dated Treasuries from $2 billion to at least $4 billion per operation. Michael Hartnett, chief investment strategist at BofA Securities, characterized the move as "quasi-QE" and incorporated it into a framework of "Bessent put options." His analysis includes dollar swap agreements with Asian and Gulf nations, FX intervention on the yen, and this latest quasi-QE via doubled long-end buybacks, conducted with the Fed's tacit approval.

Hartnett explicitly stated that Bessent's objective is to defend the 5% threshold on 30-year yields—a "Maginot Line." If yields cannot be pushed back below 5%, the dollar faces significant downside, prompting investors to increase short positions in AI hyperscalers, private credit, and other highly leveraged assets, along with cyclical sectors like financials. However, the market's relief proved short-lived—long-end yields rebounded fully the next day, with 30-year yields returning to 5.25%-5.26%. Hartnett remains cautious, noting that panic-driven "fixes" should "cap but not push down" Treasury yields.

Hedge Funds Vote with Their Feet: Spot Selling Aligns with Options Bets

Bessent's intervention is triggering ripple effects in the FX market. Barclays reports that hedge fund clients sold dollars persistently throughout August, with the trend accelerating significantly after the buyback announcement. This selling exhibits clear "directional" characteristics—not mere position adjustment, but a systematic bet on structural dollar weakness.

Options market signals are even stronger. Akshay Saxena, head of Asian FX options trading at Citi in Singapore, observed: "Since the Treasury's buyback announcement, we've seen broader demand for dollar downside hedging in the FX options market." A key indicator shows that the premium for hedging dollar downside risk over the next month, relative to hedging upside risk, has climbed to its highest level since February. According to DTCC data based on contracts worth $150 million or more, demand for dollar-euro puts exceeded dollar calls by 47% on August 21. Barclays' Schoeneborn added that one-month implied volatility for the Swiss franc surged to a two-week high, with similar metrics for the euro, pound, and Canadian dollar also rising as institutional interest in dollar put structures revives.

The "Dollar Sacrifice" Narrative Takes Shape: Wall Street Shifts to Bearish Consensus

Bessent's intervention is reshaping Wall Street's collective view on the dollar's outlook. Citi has slashed its three-month dollar index forecast from 102.12 to 98.34, citing market pricing for "financial repression"—lowering yields to reduce financing costs at the expense of currency weakness. Citi strategists explicitly recommend clients use the dollar as a funding currency to invest in high-yielding emerging market currencies, while maintaining that gold has further upside.

Franklin Templeton and other institutions also note that Washington's move signals a willingness to sacrifice some dollar strength to control interest costs, which will fuel de-dollarization trends. BofA's Hartnett issues a sterner warning: if Bessent fails to push 30-year yields below 5%, it could trigger a sharp dollar decline and a shift in asset allocation toward shorting risk assets, leverage, and cyclical sectors—all potentially erupting before the November midterm elections.

Barry Bosworth, senior fellow at the Brookings Institution, warns that capping long-end yields without addressing deficits effectively transfers the bond market crisis to the exchange rate, risking a trajectory similar to Japan's prolonged yen depreciation.

$40 Trillion Debt and AI-Driven Issuance: Bessent's Toolkit Is Running Thin

The fundamental drivers pushing Treasury yields higher remain unchanged. Total US public debt has surpassed $40 trillion for the first time, with net issuance projected at approximately $2 trillion in both 2026 and 2027. Meanwhile, the AI boom has generated massive financing needs—since 2026, tech giants including Alphabet, Amazon, and Meta have issued nearly $220 billion in combined bonds, more than double the full-year 2025 total.

JPMorgan warns that the Treasury's buyback operations are "treating symptoms, not causes"—essentially issuing more short-term debt to repurchase long-term bonds, representing a debt restructuring rather than genuine liquidity injection. The $4 billion per-operation cap is a drop in the bucket within the nearly $40 trillion US Treasury market.