Hayes Flags EUR/JPY as Crypto Alarm; Fed Tools Dormant

Arthur Hayes outlined a sequence tying a lower EUR/JPY exchange rate to a rise in dollar liquidity that, in his view, could support risk assets including Bitcoin and Ether. Hayes published the argument in a Sept. 2 essay and set a benchmark of EUR/JPY moving toward 140 by June 2027.

Hayes’s framework has four links: a decline in EUR/JPY driven by pressure in French sovereign and bank funding and repatriation of Japanese capital; stress spilling into dollar repo markets; use of the Fed’s FIMA repo facility by foreign official institutions to obtain dollars; and an increase in Fed reserve-management purchases of short-dated Treasuries. Hayes holds a long Bitcoin position and a target of $10,000 for Ether by the end of 2026.

Market data show the currency leg has started to decline. The ECB reference rate for EUR/JPY fell from 185.63 yen per euro on Sept. 1 to 181.21 on Sept. 3, a drop of 2.38%. Hayes’s 140 level is about 29% below the Sept. 3 reading.

Federal Reserve balance-sheet entries do not show the dollar plumbing Hayes describes. The H.4.1 release for the week of Aug. 26 listed $0 under “Repurchase agreements: Foreign official,” the line the Fed uses for FIMA repo outstanding. Central bank liquidity swaps totaled $121 million in that report. At the same time, foreign-official and international-account reverse repurchase agreements averaged about $361.9 billion for the week and stood at roughly $355.5 billion on Wednesday; those reverse repos are investments placed at the Fed and are distinct from FIMA repo operations in which the Fed would supply dollars against Treasuries.

Reserve-management purchases (RMPs) also show no activation tied to market stress. For the Aug. 14 to Sept. 14 window the New York Fed scheduled about $17 billion of reinvestment purchases and no RMPs. RMPs had been paced at $40 billion per month through mid-April, stepped down to $10 billion per month and then declined to zero in the current schedule. In March, the System Open Market Account manager described the present program as beginning after reserves entered an ample range in December 2025 and noted that RMPs differ from past large-scale asset-purchase programs.

French market data provide the most direct test of the initial leg. Agence France Trésor listed the 10-year OAT yield at 4.21% on Sept. 3, while a long-dated OAT auction that day drew €35.879 billion of bids for €13.497 billion served, about 2.66 times coverage. A Banque de France stability report highlighted that leveraged hedge-fund activity in OAT repo and short-maturity funding could amplify a liquidity shock. An ECB study from November 2024 showed euro-area banks had about €1.6 trillion of dollar repo exposure, with 85% maturing within a week and much collateral comprised of U.S. Treasuries; French bank branches were the most active euro-area branches in the U.S. repo market. Aggregate liquidity measures remain elevated: the ECB reported a 142.44% liquidity coverage ratio for French significant institutions in Q1 2026, and French supervisors in July described liquidity and solvency as comfortable.

IMF research cited by market participants found a large common crypto factor driving much of crypto price variation and that tighter U.S. monetary policy reduces that factor through lower risk-taking. On Sept. 3, Bitcoin traded near $81,000 and Ether near $2,500. Hayes’s proposed chain would require a sustained move toward 140 alongside worsening French sovereign or bank funding signals, positive FIMA repo usage and renewed RMPs tied to persistent reserve or repo pressure for the sequence to reach dollar liquidity and then markets.