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US-Japan yen intervention raises liquidity questions for risk assets

A rare joint US-Japan currency intervention aims to support the yen while potentially boosting dollar liquidity, though broader market instability poses risks.

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The US and Japan executed their first coordinated yen intervention in 28 years last week, with the Federal Reserve Bank of New York selling euros on behalf of the US Treasury as the yen had weakened to 40-year lows near 164 per dollar. The intervention reflects heightened coordination between Washington and the Bank of Japan amid record bond yields and unwind pressures from the yen carry trade.

Treasury Secretary Scott Bessent signalled continued cooperation ahead of an August G20 meeting with BoJ Governor Kazuo Ueda, emphasising Japan's commitment to monetary and financial stability. Bessent also called for expansion of the Federal Reserve's Foreign and International Monetary Authorities repo facility, which provides dollar liquidity to foreign institutions using Treasury collateral.

The intervention points to potential benefits for Bitcoin and risk assets through expanded global dollar supply, though economists have noted that ongoing coordination between the US government and BoJ introduces new dynamics. The deepening yen carry trade unwind remains a counterbalancing concern that could constrain liquidity if it accelerates further.

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