Japan's Historic Yen Intervention Sets Focus on 155 Threshold

Japan's joint intervention with the US aims to strengthen the yen, with the 155 yen-per-dollar level emerging as a critical test for the rally's sustainability. Previous interventions in April and May only temporarily moved the rate toward 155 before the yen weakened again, suggesting official action provides temporary relief rather than permanent solutions. Investors are now watching whether the yen can break decisively below 155 to signal a meaningful structural shift in the currency market.