USD pressured as Treasury boosts long-dated buybacks from September 9

The US Treasury confirmed it will increase the size of liquidity support buyback operations for longer-dated securities, with the change taking effect from September 9, 2026. The announcement lands at a time when long-dated Treasury yields have been under sustained upward pressure, with investors demanding higher compensation for fiscal, inflation and supply risks. For FX markets, the operation is a double-edged instrument: it improves secondary-market liquidity in off-the-run issues, but it also signals official discomfort with the level of long-end yields, which markets can interpret as a soft form of yield management. That interpretation tends to be dollar-negative, since it implies tolerance for higher inflation risk premia rather than fiscal consolidation. EUR/USD and USD/JPY are the primary expression channels, with USD/JPY particularly sensitive to any compression in the US 10- and 30-year yields. Traders should monitor upcoming refunding announcements, auction bid-to-cover ratios and 30-year term premium estimates. Persistent long-end weakness alongside a softer dollar would confirm a fiscal-risk premium narrative rather than a conventional rate-differential trade.