USD slides as Treasury's expanded buyback signals fiscal stress at long end

The US dollar came under broad pressure after the Treasury unveiled a larger-than-expected liquidity support buyback programme for longer-dated securities, a move markets read as an unconventional response to rising long-end yields rather than routine plumbing. Reporting from The Wall Street Journal framed Secretary Bessent's decision as a deliberate signal from a policymaker willing to intervene when the curve moves against him, raising the prospect of repeat interventions if term premium pressure resumes. For FX, the implication is negative for USD: buybacks that cap yields without addressing the underlying fiscal deficit erode the real-yield support that has underpinned the greenback, while inviting questions about Treasury independence from political pressure. DXY weakness has been most visible against EUR/USD and USD/JPY, where narrowing rate differentials amplify the move. Traders should watch the 10- and 30-year auction tails and the September 9 implementation date for confirmation. Failure of long yields to settle despite the buyback expansion would likely deepen dollar losses, whereas a stabilising long end could allow USD to retrace part of the decline.