A crack appeared in Jackson Hole: the US sold euros and bought yen without prior notice, and the European Central Bank worried that dollar swap lines would "disappear overnight."

A crack appeared in Jackson Hole: the US sold euros and bought yen without prior notice, and the European Central Bank worried that dollar swap lines would "disappear overnight."

The Jackson Hole global central bank symposium has concluded, with European Central Bank officials leaving with unease—far from convinced that long-standing norms of global cooperation remain intact and worried about further turmoil in already strained relations with Washington.

According to a Reuters report on August 30, the trigger was two unconventional actions by the U.S. Treasury Department recently: selling euros and buying yen on August 1 without prior notice as is customary, and planning to increase long-term Treasury bond repurchases to lower long-term borrowing costs. Several European officials privately described this "surprise attack" as "infuriating."

A deeper concern lies in the possibility that the Trump administration might extend political interference to dollar swap lines —a reserve mechanism for dollar liquidity considered a cornerstone of global financial stability. Officials have warned that it could "disappear overnight."

Although Federal Reserve policymakers tried to reassure their European counterparts this week, with Chairman Warsh promising to fulfill all commitments and extending goodwill by posing for a photo with the Governor of the Bank of Canada, the Fed could not offer absolute assurances against the Trump administration’s sudden policy shift due to the institutional separation between the central bank and the executive branch.

Missed calls: Euro sale without prior notice

According to reports, in the yen intervention transaction on August 1, the U.S. Treasury sold euros and bought yen. Treasury Secretary Bessenter later confirmed the operation, saying he had assured central banks in the region that it was simply a "redistribution of resources"; on Friday, he also stated that the foreign exchange assets used to purchase yen came from the Treasury's Foreign Exchange Stabilization Fund (ESF).

But European officials were particularly annoyed that the US hadn't informed them in advance that the euro sale was part of the deal, as is customary. According to media reports, one informed official said, "It's infuriating; you should always pick up the phone and give them a heads-up ." Another bluntly stated:

This sends the message that the United States can do whatever it wants.

Some officials were more lenient, suggesting the unusual nature of the transaction might simply be an unintentional oversight. A U.S. official responded that the U.S.-Japan intervention was to address disorderly fluctuations in the yen and support global financial market stability, and was "not directed against anyone else"; the Treasury Department maintained close and continuous communication with its counterparts but declined to comment on operational details.

Furthermore, Bessant's plan to increase long-term government bond repurchases (which may require issuing more short-term government bonds for financing) is also a concern for ECB officials —like the purchase of yen, it indicates a government's willingness to take unconventional measures to lower borrowing costs. The report states that a source said:

"These interventions are usually only temporary relief, but they are clearly very concerned. What's next? Will they pressure the Federal Reserve to start buying bonds in the market?"

Although the Federal Reserve is the only monetary policy decision-making body in the United States and is designed to be independent of the elected government, sources have reportedly said that Trump has indicated he is willing to do whatever it takes to achieve his goals, raising concerns among European officials that this could trigger market turmoil far beyond the United States.

U.S. officials reiterated that increasing long-term Treasury repurchase agreements was intended to provide more liquidity to the long-term sector, and was "not a monetary policy measure, nor a cap on interest rates." However, U.S. Treasury officials said on Thursday that the Treasury was "truly focused on lowering long-term yields" because yields had risen above what it considered to be their "fair value."

Concerns about the swap quota "disappearing overnight"

Another concern among European officials is that political interference could ultimately impact the dollar swap lines—the backup of dollar liquidity provided by the Federal Reserve to major central banks around the world and considered a cornerstone of global financial stability.

These swap lines ensure that global commercial banks maintain access to US dollars, especially during times of financial stress. The Federal Reserve renews the mechanism annually, provided that it effectively protects US interests and markets—because overseas banks may be forced to sell US Treasury bonds during times of global turmoil.

According to reports, a source said:

"But this administration isn't always rational. When they implement retaliatory trade policies with their closest allies, Trump might say, 'They're blackmailing us,' and the swap quotas could disappear overnight."

However, sources also indicated that there are currently no signs that these backup mechanisms are at risk and they are expected to remain unchanged—the swap lines are authorized by the Federal Open Market Committee (FOMC) and operated solely by the Federal Reserve, not the government. Treasury officials also responded:

"The decision-making power regarding Federal Reserve tools and swap line arrangements rests with the Federal Reserve, and any announcements from the Treasury Department regarding yen operations or debt repurchase agreements do not indicate the opposite."

Walsh's reassurance and the persistent gap between expectations

In response to concerns from their European counterparts, Federal Reserve policymakers made efforts this week to ease tensions and pledged to fulfill all commitments.

The report states that Federal Reserve Chairman Warsh visited Europe just over a month after taking office, striving to build good relations with local officials and leaving an overall positive impression. At his first Jackson Hole symposium as Fed leader, he also posed for a photo with Bank of Canada Governor Tiff Macklem—a small but noteworthy gesture, given Trump's escalating and intense trade war with Canada.

However, given the institutional separation between the central bank and the executive branch, Federal Reserve officials cannot offer absolute assurances regarding President Trump's sudden policy shift. Bessant, on the other hand, looks forward to discussing financial stability with G20 finance ministers and central bank governors in Asheville, North Carolina, in the coming days to further advance the government's agenda.

Analysts believe that the aftermath of the Jackson Hole meeting has not yet subsided, and the restoration of mutual trust among transatlantic central banks still needs time to prove itself.

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