Bessent and Warren clash over yen intervention

Treasury Secretary Scott Bessent fired back at Sen. Elizabeth Warren in a letter dated Thursday, offering her a "tutorial on Foreign Exchange for Dummies" after she questioned a rare U.S. intervention in the yen market. The exchange, made public Friday, underscores the tense relationship between the two officials.

Bessent wrote that Warren's criticism "unfortunately reveals that you know even less about foreign exchange markets than you do about banking," according to a copy of the letter obtained by the New York Post. He accused the media of failing to catch what he called a "remedial error" in her initial inquiry.

Warren, the top Democrat on the Senate Banking Committee, had sent an Aug. 13 letter demanding details about Treasury's use of the Exchange Stabilization Fund (ESF) to buy yen. The operation, conducted with Japan, marked the first coordinated U.S.-Japan effort to strengthen the currency since 1998, and the first U.S. purchase of yen in over two decades.

The dispute over the transaction

At the heart of the disagreement is Warren's characterization of the intervention. In her letter, she wrote that "American taxpayers would ultimately bear the cost if Japan were unable to repay" the department. Bessent rejected that premise outright.

"Treasury exchanged existing Exchange Stabilization Fund foreign-currency assets for yen," he wrote. "No new congressional appropriation was involved, and no credit was extended to Japan. Japan owes Treasury nothing."

Bessent added, "There is therefore no risk that Japan will fail to repay a debt that does not exist."

Warren's office did not immediately respond to a request for comment, but her team pushed back. Senate Banking Committee spokeswoman Saloni Sharma told the New York Post that Warren's questions still stand and that Bessent should focus less on his "petty grievances" and more on reducing the cost of living for American families.

Bessent's defense of the intervention

Bessent defended the move as necessary to protect U.S. economic interests. In his letter, he argued that "disorderly yen markets can trigger forced unwinds, which could destabilize global markets and ultimately raise borrowing costs for American families and businesses," as reported by The Japan Times.

Japan is the largest foreign holder of U.S. government securities, and Bessent noted that extreme volatility in the yen could feed through to higher U.S. interest rates.

The operation involved selling euros from the ESF to buy yen, according to Bessent, who earlier this month indicated the Treasury had used euros. He declined to specify the exact amount of the U.S. purchase.

Records and aftermath

Japan reported spending a record $96.4 billion in the past month to support the yen, according to The Japan Times. The New York Post cited a figure of $96.5 billion from Japanese data. Both figures reflect the largest intervention on record.

The yen initially strengthened after the intervention but has since given back some gains, falling below ¥160 per dollar on Friday for the first time since the operation.

Bessent's letter also took aim at the press, writing that "not a single member of your media mob has a rudimentary-enough level of financial market literacy to spot your remedial error," as quoted by the New York Post.

He closed by expressing hope that Warren's next letter would demonstrate she has learned the difference between a currency purchase and a swap or a loan.

Political fallout

Warren responded publicly on X, writing: "Tough couple weeks for Sec. Bessent. His effort to prop up a foreign currency hasn't worked. His failed intervention in Treasury markets was blasted by his mentor as burning 'two centuries' of credibility. Trump's economy is crushing families. Maybe he should focus on that."