According to an August 30 Reuters report, following the conclusion of the global central bank symposium, European Central Bank (ECB) officials expressed unease regarding two recent unconventional operations by the U.S. Treasury. The first was the Treasury's sale of euros and purchase of yen on August 1 to support the yen, without the customary prior notification. The second was its plan to increase long-term Treasury buybacks to suppress long-term borrowing costs. Several European officials privately described these "raids" as "outrageous."

A deeper concern is that the Donald Trump administration might extend political interference to the dollar swap lines, a dollar liquidity backstop mechanism considered a cornerstone of global financial stability. One official warned that it could "disappear overnight." Although Federal Reserve Chairman Kevin Warsh pledged to honor all commitments, given the institutional separation between the central bank and the executive branch, the Federal Reserve cannot provide an absolute guarantee against sudden policy shifts by the Donald Trump administration. U.S. Treasury officials, however, reiterated that the increased long-term Treasury buybacks are aimed at providing more liquidity to the long-term sector and are focused on pushing down long-term yields.