Arthur Hayes: Bitcoin “Very Bullish” If Fed Expands Balance Sheet via Yen Support

Former BitMEX CEO Arthur Hayes says possible intervention to support the Japanese yen could benefit Bitcoin if it leads to new U.S. dollar liquidity.

His comment follows reports of New York Fed dollar-yen rate checks this January. Current Federal Reserve balance sheet data, however, shows no evidence of liquidity expansion.

In a post on X, Hayes potential support for the yen would likely require the Fed to sell dollars and buy yen, increasing liquidity in the financial system.

Hayes pointed to the Federal Reserve’s weekly H.4.1 report as the key indicator to watch. He said an increase in the “foreign currency denominated assets” line item would signal that the Fed is expanding its balance sheet.

Historically, periods of balance sheet growth have coincided with stronger Bitcoin performance.

Speculation intensified after reports that the New York Fed conducted dollar-yen rate checks yesterday, January 23. According to Grok AI, rate checks are often seen as a signal that authorities are closely monitoring currency markets. They often precede intervention but do not confirm that action has taken place.

Japanese officials have also issued repeated warnings against excessive currency moves this month. The yen strengthened following these developments, briefly trading near 155.90 per dollar after a period of sustained weakness. Despite the signals, no official confirmation of U.S. or coordinated intervention has been announced.

Federal Reserve data does not yet support the liquidity-driven bull case outlined by Hayes. The most recent H.4.1 releases show foreign currency-denominated assets holding steady near $19 billion, with no notable increase.

The Fed’s total balance sheet remains around $6.58 trillion and continues to contract. Brain AI the balance sheet estimate is shrinking by roughly $75 billion per month. Bank reserves also declined sharply in the latest data, pointing to a net liquidity drain rather than an injection.

While Treasury holdings increased slightly in the most recent report, the overall balance sheet did not expand. Analysts said this indicates a continuation of quantitative tightening rather than a policy shift.

Brain’s analysis also warned that yen intervention could pressure Bitcoin in the short term if currency moves become abrupt. A rapid rise in the can trigger an unwind of the yen carry trade, where investors borrow yen to fund investments in higher-risk assets.

When those trades unwind, investors often sell risk assets to cover positions. Analysts said this process can weigh on equities and cryptocurrencies, including Bitcoin, even if broader liquidity conditions later improve.

As of this press time, Bitcoin trades at $89,470, while the dollar-yen exchange rate fluctuates between 155 and 158.

Meanwhile, Crypto Observer HQ that confirmation of a bullish shift would require clear evidence of balance sheet expansion. That would likely appear as a rise in foreign currency assets without offsetting reductions elsewhere on the Fed’s balance sheet.

Until then, observers describe current conditions as a liquidity reallocation rather than a pivot. Investors are watching upcoming H.4.1 releases for signs that yen stabilization efforts are translating into net dollar liquidity.

For now, analysts say yen intervention remains a potential source of volatility for Bitcoin, not a confirmed catalyst for sustained gains.