Washington Spent $497 Million Propping Up the Japanese Yen in July
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The yen fell to 160.03 per dollar on November 12, 2026. That same day, the Federal Reserve Bank of New York published its quarterly foreign exchange report, which confirms what the U.S. did the last time the yen was this weak.
The Treasury bought 79.4 billion yen, worth $497.37 million, on July 31, 2026. It paid with euros from its Exchange Stabilization Fund (ESF), a Treasury reserve pool used for currency operations. This marked the first U.S. yen purchase since 1998.
It was already public that the U.S. took part, because joint action was reported in early August. The new information is the exact size, date, and funding. The related funds barely moved. Invesco CurrencyShares Japanese Yen Trust (NYSEARCA:FXY) rose 0.02% to $57.30, and iShares MSCI Japan ETF (NYSEARCA:EWJ) fell 0.69%. Invesco DB US Dollar Index Bullish Fund (NYSEARCA:UUP) gained 0.22% to $29.42, just under its 52-week high of $29.44.
What the Report Confirms and What It Leaves Open
The New York Fed served only as the Treasury’s agent, and the Fed did not step in with its own money. On July 30, it ran rate checks for the Treasury, which means it called dealers for dollar-yen quotes as a warning, and the yen rose 2.3% that day.
“Spent” in the headline is shorthand. The Treasury traded euros for yen and still holds the yen. Over the quarter, ESF euro holdings fell from $13.1 billion to $12.6 billion, while yen holdings rose from $5.8 billion to $6.5 billion.
A to-do list in a photo from a July 31 Camp David cabinet meeting suggested Treasury Secretary Scott Bessent was considering $5 billion to $10 billion in yen purchases, according to Reuters. That remains a note in a photo, and the report shows only one purchase.
Why Tokyo Carried the Weight
Japan’s Ministry of Finance used a record 15.4 trillion yen, about $96.47 billion, over three days. The U.S. purchase was about 0.5% of that amount, so it served as a political signal of support.
Washington’s likely goal is protecting its own markets. If Japan had to sell Treasuries to pay for its defense of the yen, U.S. bond yields could rise.
The effect faded anyway. The dollar fell from about 164 yen to about 155 yen, but it closed at 159.85 on November 12 after reaching a 19-month high. When the interest-rate gap between the Fed and the Bank of Japan drives the currency, intervention can slow the move but rarely reverse it.
How FXY, EWJ and UUP Holders Are Exposed
FXY holds yen directly, so it rises if intervention or a rate hike lifts the currency. It is down 30.51% over five years.
EWJ is unhedged. A weak yen raises exporters’ reported profits, but it also cuts returns for dollar-based investors. The fund is still up 13.89% this year.
UUP is up 8.84% this year, and that dollar strength is the position most exposed if Japan and the U.S. act together again.
What Could Lift FXY Before the Bank of Japan’s December Decision
FXY has a realistic path higher. Japan has shown it will defend the yen near 160, and the Finance Minister said Japan will respond to sharp, one-sided moves while working closely with the U.S. Treasury.
Most economists in a poll expect the Bank of Japan to raise its policy rate to 1.5% in December. That would narrow the rate gap that intervention alone could not close.
FXY appears less exposed than UUP to coordinated action, because the dollar fund is sitting at its high. The main risk is U.S. inflation data that keeps the Fed hawkish into its December meeting.
If dollar-yen closes above the July high of 163.98 before the Bank of Japan’s December decision and Japan does not act, this view is wrong.
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Omor Ibne Ehsan is a writer at 24/7 Wall St. He is a self-taught investor with a focus on growth, cyclical, and dividend equities that have strong fundamentals, value, and long-term potential. He also has an interest in high-risk, high-reward investments such as penny stocks.
