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Scott Bessent just pulled the biggest lever available to a Treasury secretary who doesn’t want to wait around for the Fed. On August 19-20, the Treasury announced it would double its buybacks of 10- to 30-year Treasuries to at least $4 billion per operation, up from $2 billion previously. The expanded sessions are set to run from September 9 through November 4.
The timing wasn’t subtle. Thirty-year Treasury yields had climbed to 5.27-5.29%, their highest level in 19 years. At that altitude, borrowing costs for the US government, for corporations, and for anyone with a mortgage start to become genuinely painful.
The mechanics of a modern twist
What Bessent is attempting resembles what bond market veterans call a “twist,” a strategy where the government buys long-dated bonds to push down long-term yields while potentially issuing more short-term debt to fund the purchases. It’s a way to reshape the yield curve without printing new money or coordinating directly with the Federal Reserve.
The initial market reaction suggested it worked, at least for a moment. Long-end yields dropped by roughly 9-10 basis points after the announcement. The US dollar weakened. The 30-year Treasury-swaps spread tightened, a technical signal that supply pressure on long bonds was easing.
Then yields bounced back.
A $4 billion band-aid on a $40 trillion problem
The skepticism isn’t hard to understand when you look at the numbers. US national debt now exceeds $40 trillion. The fiscal deficit hit $1.8 trillion in just the first 10 months of fiscal 2026. Against that backdrop, buying back $4 billion of bonds per session is the financial equivalent of bailing out a swimming pool with a coffee mug.
Bessent’s broader playbook
The buyback expansion didn’t arrive in isolation. On July 31, the Treasury executed its first US yen purchases in three decades. Earlier in August, signals emerged that the Treasury was considering cuts to long-term bond issuance, a move that would complement the buyback strategy by reducing supply from both directions.
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What investors should be watching
The near-term trajectory of 30-year yields will serve as a scorecard for Bessent’s strategy. If yields settle meaningfully below their recent highs and stay there through the September-November buyback window, the intervention will look like a success. If yields push back toward 5.3% or higher despite the expanded buybacks, the pressure on the Treasury to either scale up dramatically or pivot to a different approach would intensify considerably.
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