Japan's recent yen intervention efforts have involved the strategic use of the Federal Reserve's Foreign and International Monetary Authorities (FIMA) repurchase agreement facility. This facility allows foreign central banks, including Japan's, to temporarily exchange U.S. Treasuries for dollars, thereby securing the necessary liquidity for currency intervention without directly selling off its U.S. government debt holdings. This approach addresses a key concern for the United States, which was to prevent Japan, the largest foreign holder of U.S. government debt, from having to dump large quantities of Treasuries to finance its unilateral intervention. Such sales could have put upward pressure on U.S. yields and destabilized U.S. funding markets.
Washington's willingness to support Japan's intervention, including through the FIMA facility, is partly driven by a self-preservation element. A persistently weak yen could trigger further selling in Japanese government bonds, and higher yields in Japan could spill over into global bond markets, impacting both U.S. and Japanese long-term borrowing costs. The U.S. Treasury Secretary Scott Bessent has confirmed Friday's joint intervention and stated that Washington "will not hesitate to participate in further joint intervention," signaling ongoing coordination. The FIMA facility, initially introduced in 2020 as a pandemic-era emergency tool, is now being highlighted as a crucial backstop.
The Japanese Finance Ministry explicitly stated its plan to use the FIMA repo facility for future interventions, a signal that analysts believe is significant. Masahiko Loo, senior macro strategist at State Street, commented that this highlights Japan's ability to raise dollar liquidity without selling Treasuries, thereby "addressing concerns that MOF intervention could pressure U.S. funding markets through short-end UST sales." Louise Loo, head of Asia economics at Oxford Economics, also noted this as a key reason for U.S. participation, as it helps avoid forced selling of U.S. debt.
The joint intervention on Friday, which saw Japan potentially spend as much as $36.58 billion buying yen, followed a solo intervention by Tokyo a day earlier worth up to $58.97 billion. The yen initially surged more than 1 percent to 155.20 per dollar after the announcement, though some analysts remain skeptical about the long-term impact given underlying factors like interest rate differentials. However, the use of the FIMA facility provides Japan with a crucial tool to manage its currency without creating instability in global financial markets.
