The annual Jackson Hole gathering of global central bankers has drawn to a close, yet European Central Bank officials departed with lingering unease. They remain far from convinced that long-established norms of international cooperation are still intact, and they worry that already strained relations with Washington could face further turbulence.
According to a report on August 30th, the trigger was two unconventional moves by the U.S. Treasury Department in recent weeks. On August 1st, without following the customary practice of prior notification, the Treasury sold euros and bought yen to support the Japanese currency. Additionally, there is a plan to increase purchases of long-term Treasury bonds to push down borrowing costs at the longer end of the curve. Several European officials have privately described this "surprise action" as "infuriating."
Deeper concern centers on the possibility that the Trump administration might extend political interference to the U.S. dollar swap lines, a crucial backstop mechanism for dollar liquidity widely seen as a cornerstone of global financial stability. Some officials have warned that these facilities could "disappear overnight."
While Federal Reserve policymakers made concerted efforts this week to reassure their European counterparts, with Chair Warsh pledging to honor all commitments and signaling goodwill by posing for a photo with the Canadian central bank governor, the Fed's institutional separation from the executive branch means it cannot offer absolute guarantees against sudden policy shifts by the Trump administration.
An Unexpected Currency Operation
Reports indicate that during the yen intervention on August 1st, the U.S. Treasury sold euros and bought yen. Treasury Secretary Bessent later confirmed the operation, stating that regional central banks had been assured it was merely a "reallocation of resources." On Friday, he added that the foreign assets used for the yen purchase came from the Treasury's Exchange Stabilization Fund (ESF).
However, European officials were particularly irritated that the U.S. did not follow convention by informing them in advance that the euro sale was part of the transaction. According to one official familiar with the matter, this was infuriating because one should always pick up the phone and give a heads-up beforehand. Another official commented directly: "The signal this sends is that the U.S. does whatever it wants."
Some officials took a more lenient view, suggesting the trade was so unusual that it might have been an unintentional oversight. A U.S. official responded that the joint intervention with Japan was aimed at addressing disorderly yen movements and supporting global financial market stability, stressing that it was "not directed at anyone else." The Treasury maintains close and continuous communication with counterparts but does not comment on operational details.
Additionally, Bessent's plan to increase purchases of long-term Treasury bonds, potentially funded by issuing more short-term debt, has also raised concerns among European Central Bank officials. Similar to the yen purchase, it suggests the administration's willingness to adopt unconventional measures to lower borrowing costs. One source said: "These interventions usually provide only temporary relief, but they are clearly worried. What comes next? Will they pressure the Fed to start buying bonds in the market?"
Although the Federal Reserve is the sole monetary policy decision-maker in the U.S. and is designed to be independent of the elected government, sources indicate that Trump has shown he will go to great lengths to achieve his goals. European officials fear this could trigger market turbulence extending far beyond U.S. borders.
U.S. officials, for their part, reiterated that the increased long-term Treasury purchases are intended to provide more liquidity to the long-end sector, stating that it is "not monetary policy, nor is it setting a cap on interest rates." However, a Treasury official stated on Thursday that the department is "genuinely focused on bringing down long-end yields," as they have risen above what is considered "fair value."
Concerns Over the Future of Swap Lines
Another layer of worry for European officials is that political interference could eventually affect the dollar liquidity backstop the Fed provides to major global central banks, namely the dollar swap lines, which are regarded as a bedrock of global financial stability.
These swap arrangements ensure that global commercial banks maintain access to dollars, particularly during times of financial stress. The Fed renews the mechanism annually, provided it demonstrably safeguards U.S. interests and markets, as overseas banks might be forced to sell U.S. Treasuries during global turmoil.
One source remarked: "But this administration isn't always rational. When they pursue retaliatory trade policies against even their closest allies, Trump might say 'they are extorting us,' and the swap lines could disappear overnight."
Nevertheless, the same source noted there is currently no indication that these backstop facilities are in jeopardy, and they are still expected to remain unchanged. The swap lines are authorized by the Federal Open Market Committee (FOMC) and operated exclusively by the Fed, not the government. A Treasury official also responded: "Decisions regarding Fed tools and swap line arrangements rest with the Federal Reserve. Any Treasury announcements about yen operations or debt purchases do not suggest otherwise."
Efforts at Reassurance and Lingering Doubts
In response to the concerns from their European counterparts, Federal Reserve policymakers worked hard this week to alleviate tensions, pledging to fulfill all commitments.
The report notes that Fed Chair Warsh, just over a month into his tenure, visited Europe to build rapport with local officials, leaving a generally positive impression. At his first Jackson Hole meeting as the Fed's leader, he also posed for a photo with Bank of Canada Governor Tiff Macklem, a small but noteworthy gesture given the escalating and intense trade war Trump is waging with Canada.
However, due to the institutional separation between the central bank and the executive branch, Fed officials cannot provide absolute guarantees against sudden policy reversals by President Trump. Bessent, meanwhile, looks forward to discussing financial stability issues with G20 finance ministers and central bank governors in Asheville, North Carolina, in the coming days, as part of advancing the administration's agenda.
Analysts suggest that the aftermath of the Jackson Hole meeting is far from settled, and rebuilding mutual trust between central banks across the Atlantic will require time.
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