Yen Soars Past 155 as Japan's Intervention Fears Fuel Rate Hike Expectations

The Japanese yen has surged past the 155 level against the US dollar, reaching its highest value since February. This rapid appreciation has been fueled by rising expectations of a Bank of Japan rate hike and the triggering of stop-loss orders as the USD/JPY pair fell below the key threshold.

Market participants are increasingly concerned about supply pressures in the US Treasury market, which may intensify if Japan continues to sell U.S. Treasuries to finance its record-breaking foreign exchange interventions. According to data from the Japanese Ministry of Finance, authorities spent approximately JPY 15.4 trillion (about USD 98.6 billion) on intervention between August 1 and August 26.

Jun Mimura, Japan's top foreign exchange official, stated that his 'combat-ready stance' on the yen issue remains unchanged. Meanwhile, implied volatility in the options market indicates that market participants are increasing their bets on yen appreciation, with premiums for hedging against risks approaching cycle highs.