Arthur Hayes on how the US may prevent Japanese financial institutions from dumping US Treasury bonds

Arthur Hayes, co-founder and former CEO of BitMEX, has published a new macro essay on his Medium blog arguing that stress in Japan’s bond and currency markets could force the United States into an unconventional rescue that indirectly supports U.S. Treasuries and risk assets. In his view, a combination of a weakening yen and rising yields on Japanese Government Bonds (JGBs) is creating the conditions for a potential crisis, given Japan’s status as a major holder of U.S. Treasury securities. Hayes notes that Japan holds trillions of dollars of U.S. Treasuries, so disorder in Japan’s bond market or a sharp yen move could push Japanese financial institutions to sell those Treasuries, pressuring U.S. yields higher and destabilizing global markets. To prevent large-scale dumping of U.S. Treasuries by Japanese institutions, Hayes outlines a scenario in which the U.S. Treasury and Federal Reserve step in via a form of backdoor support to Japan. He argues that U.S. authorities could use tools like the Treasury’s Exchange Stabilization Fund and the Federal Reserve’s balance sheet to intervene in foreign exchange markets—creating new dollar reserves, swapping them for yen, and then channeling those yen into purchases of JGBs. In this framework, the U.S. effectively absorbs interest-rate risk from Japan’s bond market, stabilizes the yen and JGB yields, and in doing so reduces the need for Japanese investors to liquidate their U.S. Treasury holdings. Hayes links this prospective intervention directly to broader liquidity conditions and crypto markets. Because his scenario requires the Fed to expand its balance sheet—reflected, he says, in a rising “Foreign Currency Denominated Assets” line item—he contends that such a move would amount to another round of monetary expansion that tends to benefit risk assets including Bitcoin. Hayes frames this as part of a recurring pattern in which major macro stress leads to new central bank liquidity programs, arguing that any U.S. effort to quietly backstop Japanese institutions and keep them from dumping Treasuries would simultaneously support global asset prices while masking the scale of intervention behind currency and bond market operations.

✨ AI-generated background, compiled from web sources — not editorial content.

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