Bessent Warns Yen Volatility Threatens Global Financial Stability

Bessent outlined the Treasury’s strategy in an August 27 letter to Senator Elizabeth Warren, clarifying the role of the Exchange Stabilization Fund (ESF) in the July 31 joint yen-buying operation. By exchanging foreign-currency assets for yen, U.S. officials sought to curb a selloff that threatened to spill over into government bond markets. The Secretary compared this action to the department's use of the ESF to manage liquidity issues in Argentina, asserting that the most effective crisis management involves intervention before market tremors become systemic.

Despite the July intervention, the yen has shown renewed weakness, sliding back toward 160 per dollar after briefly surging to 155.20. Market sentiment remains fragile as investors weigh the possibility of further Japanese interest rate hikes against expectations of U.S. monetary adjustments. With the currency hovering near thresholds that previously triggered official action, the Treasury’s stance signals a continued commitment to maintaining stability in foreign-exchange markets to protect domestic economic interests.