Yen Hits 40-Year Lows as US Interest Rates Soar and Middle East Tensions Rise

The Japanese yen has reached its weakest level in nearly 40 years due to rising market anxiety and expectations of persistently high US interest rates. The government's Honebuto policy framework, which emphasizes public investment and close communication with the Bank of Japan, has triggered selling in the government bond market, leading to a higher yield on Japan's 10-year government bond.

The prolonged conflict in the Middle East has also contributed to the yen's decline, as disruptions to oil supplies push energy prices higher. This could lead to increased US defense expenditure and additional Treasury securities issuance, further weakening the yen.

Market participants warn that the government's planned tax reductions could impose additional downward pressure on the yen and deepen instability across Japan's bond and foreign-exchange markets. The tax cuts, which have yet to be accompanied by a clear financing strategy, are expected to reduce annual government revenue by approximately ¥4.4 trillion.

The Japanese government has attempted to contain the damage through intervention in the foreign-exchange market, but its efforts have been temporary. Speculative investors remain committed to bets on further yen depreciation, and the exchange rate has remained around ¥160 throughout June.