Yen Intervention Fails as USD/JPY Reclaims 160

Japan and the US initially carried out a rare coordinated yen intervention, selling about $59 billion to support the currency after USD/JPY approached 164. Japan later spent a record $96.4 billion over four weeks, briefly pushing USD/JPY towards 157. However, the yen weakened again, with USD/JPY breaking above 160 on 28 August and closing near 160.10. More than half of the intervention-driven gains were erased. The renewed yen weakness reflects a stronger US dollar, higher Treasury yields and expectations that the Federal Reserve may keep interest rates higher for longer. Hedge funds have also expanded short-yen positions, testing Japan’s willingness to defend the 160 level. US Treasury Secretary Scott Bessent said the intervention partly aimed to protect the US Treasury market, while critics questioned its legality, transparency and effectiveness. Officials also warned that intervention cannot resolve wider US fiscal deficits or the underlying interest-rate gap. The Bank of Japan’s 17–18 September policy meeting is the next major risk event. Markets reportedly price in an 80% chance of a rate hike. An unexpected BOJ hike could trigger a sharp unwinding of yen carry trades, as seen in August 2024, when equities and Bitcoin suffered heavy losses. A hold could leave the yen under pressure and increase volatility across global risk assets. Crypto traders should monitor USD/JPY, Treasury yields, BOJ guidance and liquidity conditions for signs of a potential Bitcoin volatility spike.