Arthur Hayes, co-founder of BitMEX and head of crypto investment firm Maelstrom, has laid out a macroeconomic thesis focused on the potential revaluation of the Japanese yen and its downstream effects on global dollar liquidity.

In his latest essay, Hayes argues that the yen is currently the most undervalued major currency, generating unsustainable economic tensions across Japan, the United States, and China. The yen's prolonged weakness stems in part from the Bank of Japan's insistence on ultra-loose monetary policy even as the Federal Reserve and other major central banks raised rates aggressively, driving the currency to multi-decade lows and prompting repeated interventions from Japanese authorities. Traditional remedies—such as aggressive interest rate hikes by the Bank of Japan or a large-scale repatriation of Japanese overseas assets—carry significant market risks, including the potential destabilization of both U.S. Treasury and equity markets. Instead, Hayes points to what he views as a more politically viable alternative: the Federal Reserve's Foreign and International Monetary Authorities (FIMA) repurchase facility.

The FIMA repo facility was originally introduced in March 2020 at the height of the COVID-19 dollar-funding squeeze, allowing foreign central banks to temporarily exchange their Treasury holdings for dollars without triggering disorderly outright sales. Under the mechanism Hayes envisions, Japan's Ministry of Finance would pledge its vast holdings of U.S. Treasuries—estimated at roughly $1.37 trillion across government and Government Pension Investment Fund (GPIF) accounts—as collateral to the Fed in exchange for dollars. Those dollars would then be sold in foreign exchange markets to buy yen, with the repatriated capital redirected into domestic Japanese government bonds and equities.

Hayes contends that this operation would effectively expand the Federal Reserve's balance sheet, injecting substantial dollar liquidity into global markets without requiring Japan to sell off its U.S. securities outright. He notes that U.S. Treasury Secretary Scott Bessent has publicly called for raising or eliminating the FIMA facility's current $60 billion counterparty cap, suggesting the political groundwork is already underway. Hayes further asserts that Fed Chair Warsh is likely to accommodate the administration's goals through the Foreign Currency Subcommittee.

My essay "Yen-quake" walks readers through how Buffalo Bill Bessent plans to manipulate the dollar-yen exchange rate and turn the money printer back on. "While a weak, weaker, and weakest yen propelled global asset markets higher over the past decade, like all good things for… pic.twitter.com/4tXwuKMFPg — Arthur Hayes (@CryptoHayes) August 11, 2026

Crypto Market Implications and Strategic Positioning

Hayes argues that such a balance sheet expansion would create a highly favorable backdrop for scarce monetary assets, with Bitcoin, physical gold, and Ether standing out as primary beneficiaries. Drawing a parallel to the COVID-19 era, when approximately $4 trillion in Fed liquidity moved in close correlation with Bitcoin's price appreciation, he expects that a renewed round of dollar creation would disproportionately favor monetary hedges over speculative technology equities.

Within the digital asset space, Hayes identifies Ether as a compelling large-cap opportunity. He cites its failure to surpass 2025 all-time highs relative to peers and its emerging function as a settlement layer for real-world assets. He also highlights Ethena (ENA) as a high-beta candidate, noting that a recovery in Bitcoin basis yields could renew interest in its USDe stablecoin product—currently the sixth-largest stablecoin by circulation—and potentially drive meaningful token appreciation from currently depressed valuations.

While the exact timing hinges on procedural adjustments to the FIMA facility, Hayes suggests that forward-looking positioning across these assets may be warranted, as underlying shifts in gold and foreign exchange markets could precede any official policy announcement. For market participants, key signals to monitor include weekly FIMA facility usage data published by the New York Fed, BOJ policy statements, USD/JPY intervention levels, and any congressional or administrative action on the counterparty cap.