US Treasury Blindsides European Central Bank With Euro Sale To Prop Up The Yen
Washington and Tokyo just carried out their first coordinated currency intervention in more than a decade. The way the US Treasury funded its side of the trade is what has European officials rattled.
A HISTORIC INTERVENTION
The US Treasury bought yen on Friday to support the battered Japanese currency, marking Washington's first yen-buying intervention with Tokyo in more than a decade as it languishes near 40-year lows. The Federal Reserve Bank of New York sold euros for yen on behalf of the Treasury through Goldman Sachs and Morgan Stanley.
The move did not come out of nowhere. A Reuters photo of Treasury Secretary Scott Bessent's notepad during a cabinet meeting at Camp David showed the words "To Do," followed by "Buy Japanese Yen (JPY) $5-10 bil," photographed on July 31, 2026.
THE PART EUROPE DIDN'T SEE COMING
The US blindsided the European Central Bank with its historic currency intervention to help Japan, only informing its counterparts in Frankfurt after it sold euros to buy the yen, the Financial Times reported. ECB President Christine Lagarde and Treasury Secretary Scott Bessent spoke about the transaction on Saturday, after the US's July 31 trade had already been executed.
Historically, Western central banks have relied on mutual consultation since World War II, typically planning currency interventions together in advance. Washington broke that pattern this time. Senior ECB officials were not shy about how they read it. Senior ECB officials didn't hide their reaction, calling it a break from long-standing cooperative practices.
WHY EUROS INSTEAD OF DOLLARS
The choice of currency was deliberate. Selling dollars to buy yen would have looked like a retreat from Bessent's strong-dollar policy, a signal no one in Washington wanted to send, so by offloading euros instead, the US could move the yen without touching its own dollar reserves.
A Treasury spokesperson defended the decision on process grounds. A Treasury spokesperson said decisions regarding the allocation of the Exchange Stabilization Fund are made by the US Treasury, taking into account assessments by the Treasury and the Federal Reserve of market liquidity, valuations, and other relevant considerations.
THE QUESTION EUROPE IS NOW ASKING
European policymakers are now asking whether this was a one-off or a preview of how the Trump administration plans to handle currency relations with allies going forward. That answer will show up the next time the yen, or any other allied currency, needs defending, and whether Frankfurt gets a phone call before the trade or after it.
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