Dollar: Downside Risks Grow as Yields Stay Capped — MUFG

MUFG analysts Derek Halpenny and Abdul-Ahad Lockhart noted that the U.S. Treasury's unplanned expansion of long-dated buybacks has become a key pressure point for the dollar. The move triggered the largest single-day dollar decline since March outside of intervention periods, suggesting policy actions are now driving FX market sentiment.

**Long-Dated Buyback Expansion Pressures Yields**

The analysts said that after Treasury Secretary Bessent announced a significant expansion of long-dated Treasury buybacks, long-end yields moved lower. This effectively functioned as a form of "stealth intervention," eroding the yield advantage of dollar assets by pushing down long-term rates. With yields constrained, the core support that had underpinned the dollar is weakening, raising downside risks.

**Policy Shift Weighs on Dollar**

Market reports indicate that the Treasury's move is partly interpreted as active management of debt costs, and it could even disrupt the Fed's monetary policy transmission mechanism. As Treasury operations begin to visibly influence the yield curve, dollar pricing is no longer driven solely by rate hike expectations but increasingly reflects uncertainty over policy coordination. MUFG's analysis suggests that this policy-driven decline in yields is limiting the dollar's rebound potential, with bearish pressure building.

**Near-Term Focus on Policy Signals**

Although the dollar index had previously drawn support from rising U.S. yields and higher odds of Fed rate hikes, the unexpected policy shift has broken that pattern. As of the latest data, the dollar index was trading around 98.77, with markets closely watching for any additional similar measures. If the Treasury continues to use buyback tools to manage long-end rates, the dollar could face further downside and extended weakness.