Bessent Attacks Warren Over $5-10 Billion Yen Intervention Query

Q: What hidden risks to U.S. borrowing costs prompted the first coordinated U.S.-Japan currency intervention since 1998?

The main hidden risk was that a plunging yen could force Japan to raise dollars by selling large amounts of U.S. Treasurys, pushing Treasury yields higher and increasing U.S. borrowing costs. That mattered because Japan is the largest foreign holder of U.S. government debt. If Tokyo had to keep defending the yen on its own, markets feared it might liquidate Treasurys rather than rely only on other liquidity tools. Heavy sales could have added stress to an already sensitive Treasury market, lifting yields not just for Washington but across the U.S. economy, including mortgages, business borrowing and other consumer credit. Analysts also pointed to a second channel: a weak yen was seen as a sign of broader instability in Japanese rates and bond markets. If that instability spread, Japanese investors could repatriate funds or unwind leveraged positions, adding pressure to global bond markets and feeding back into U.S. yields. Several experts said the intervention was partly meant to prevent “disorderly” moves from turning into forced unwinds. The emphasis on the Federal Reserve’s FIMA repo facility reinforced that view. It signaled that U.S. and Japanese officials wanted Japan to obtain dollar liquidity against its Treasury holdings rather than dump those securities into the market. In that sense, the intervention was not only about supporting the yen; it was also about shielding the U.S. Treasury market from spillover risks that could raise American borrowing costs.

3 articles · Updated · CNBC · Aug 28

Scott Bessent publicly mocked Elizabeth Warren over her Aug. 13 inquiry into Treasury’s yen intervention, saying she misunderstood how the Exchange Stabilization Fund works and offering a “Foreign Exchange for Dummies” tutorial.
His one-page response defended the move as protection against market disorder after the yen hit a 40-year low, saying Treasury swapped existing euro assets for yen and extended no credit to Japan.
Several central questions still went unanswered, including how much yen Treasury bought, the execution rate, the position’s current value, whether the ECB was consulted, and the legal basis Warren requested.
A July 31 Reuters photo showed Bessent’s notepad reading “Buy Japanese Yen (JPY) $5-10 bil,” while Warren called the effort a failure and Senate Banking Democrats said he should focus on living costs instead.
The operation was the first coordinated U.S.-Japan yen-support effort since 1998, and Japan separately spent a record 15.4 trillion yen, about $96.5 billion, from July 30 to Aug. 26.