The US dollar hit 152.89 against the yen, a seven-month low. The appreciation of the yen is evolving from a single foreign exchange market event to a core variable affecting global arbitrage trades. Wmax in-depth dismantling: The Bank of Japan plans to raise interest rates to 1.25% in September, breaking the regular rhythm of half a year. Bessent’s public pressure shows the coordination of U.S. and Japanese policies; the liquidation of institutional short positions and the 3.61 trillion yen net short position of Japanese retail investors form an extreme differentiation, hidden self-accelerating momentum. The risk of arbitrage liquidation depends on the appreciation slope and volatility, rather than the pure magnitude. The 150 mark is a sensitive area for mid-term policy, and the cross-asset impact will be transmitted along the "foreign exchange → U.S. debt → U.S. stock technology" chain.