The U.S. Treasury's expanded purchases of older long-dated bonds have reignited a familiar concern in currency markets: if Washington refuses to let borrowing costs climb, will the dollar ultimately absorb the adjustment instead? On Wednesday, the Treasury announced it would at least double the maximum size of certain buyback operations, raising the cap to "at least" $4 billion. These purchases target long-dated securities that have faced heavy selling since late June. The following day, Treasury Secretary Scott Bessent said in an interview that buybacks could exceed $4 billion and that markets had "overreacted" during the recent selloff.
This is not the first time Washington has deployed such a tool. The Treasury restarted buybacks in 2024 as a liquidity management mechanism for older, less actively traded bonds. However, the timing and scale of this announcement—arriving outside the regular quarterly issuance schedule and just ahead of a 20-year bond auction—have led some investors to interpret it as an attempt to ease pressure on long-term yields. Those yields have been climbing steadily amid a deteriorating fiscal outlook, heavy debt supply, geopolitical risks, and an uncertain Federal Reserve policy path. With the Iran conflict escalating, the 30-year yield this week hit its highest level since 2007, just one day after the U.S. gross public debt surpassed $40 trillion.
The core question now is whether policymakers will allow markets to set higher clearing yields for long-term debt, or whether they will lean on measures that could ultimately weaken the dollar—partly because such steps reduce the appeal of U.S. bonds to investors and limit related capital inflows. As Shawn Osborne, chief FX strategist at Scotiabank, put it, "There has to be a price paid. Either it shows up in higher yields, or they're going to compromise on the dollar."
Some investors see the Treasury's actions as a harbinger of currency depreciation. The concern is not outright monetization—where a central bank prints money to fund government spending—but rather that officials facing rising interest costs may try to prevent yields from reaching market-clearing levels through buybacks, shorter-dated issuance, or similar tactics, thereby reducing the duration burden that private investors must absorb. In this scenario, the adjustment does not disappear; it merely shifts. If yields are suppressed, the dollar could weaken instead—which helps explain why the biggest winners after Wednesday's surprise announcement included gold, up more than 3%, and bitcoin, which rallied 13% in two days.
Deutsche Bank strategist George Saravelos compared the effect to the Fed's "Operation Twist" of 2011-2012, which flattened the yield curve by selling short-term bonds and buying long-term ones. He noted that the buyback operations, combined with encouraging foreign central banks to use the Fed's repo facility rather than selling Treasuries directly, constitute a form of "soft financial repression" aimed at keeping long-term yields in check.
Not everyone views this as a decisive shift. Sarah Ying, head of FX strategy at CIBC Capital Markets, called it a "mini version" of past dollar stress events—milder than the "Liberation Day" selloff of April 2025 or the pressure seen in January. In her view, this is less about markets testing Washington's resolve and more the reverse. "This is actually Bessent testing the market, and the market pushed back," she said.
The timing has also sparked political speculation. With midterm elections approaching, lower long-term yields—particularly mortgage rates—could provide political support for the Trump administration. "Gas prices are high, mortgage rates are rising, and with midterms coming up, this could be something they want to address," Osborne said. Still, the Treasury's room to maneuver remains limited. Pushing too hard to ease financial conditions could reignite inflation and force the Fed to adopt a more hawkish stance. "Having a Fed hike on the eve of midterms doesn't sound like a good story," Ying remarked.
Steve Englander, head of G10 FX research and North America macro strategy at Standard Chartered, believes what unsettles investors is not the fiscal math itself, but the sense that Bessent is improvising by intervening in illiquid corners of the market—a strategy that looks like a "panic reaction" and could lose credibility if overused. "He has genuinely surprised us twice now," Englander said, though he expects the dollar to ultimately remain supported by relatively high yields and economic fundamentals, including strong U.S. productivity and earnings growth. He added that this episode does not change either side of the balance sheet. "It doesn't change the good side—the productivity side of the economy. And it doesn't change the bad side—the fiscal deficit side."
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