Japanese Yen Slides to 40-Year Low Against Dollar as BOJ Hints at Further Rate Hikes
The Japanese yen tumbled to a 40-year low against the US dollar on Wednesday, briefly touching 151.97 yen per dollar, after the Bank of Japan (BOJ) signaled that it may raise interest rates further in the coming months. The move marks a new chapter in the currency’s long decline, driven by the persistent gap between Japan’s ultra-low interest rates and higher yields elsewhere.
BOJ’s Policy Shift and Market Reaction

The BOJ, which recently ended its negative interest rate policy for the first time in 17 years, has indicated that it is prepared to tighten monetary policy further if inflation remains sustainably around its 2% target. However, the central bank’s cautious language and decision to maintain a relatively accommodative stance disappointed traders who had hoped for a more aggressive pivot.
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According to analysts, the BOJ’s message was interpreted as “dovish” relative to market expectations, prompting a sell-off in the yen. The currency has now lost more than 10% of its value against the dollar this year alone, making it the worst-performing major currency in 2024.
What This Means for Global Markets and Investors
The yen’s decline has significant implications for global financial markets. A weaker yen boosts the profits of Japanese exporters like Toyota and Sony, but it also raises the cost of imported energy and raw materials, squeezing household budgets in Japan. For international investors, the yen’s slide presents both risks and opportunities. Currency-hedged returns on Japanese equities have been strong, but unhedged foreign investors have seen their gains eroded by the yen’s depreciation.
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The widening interest rate differential between Japan and the US remains the primary driver. While the Federal Reserve has held rates at 5.25%-5.50%, the BOJ’s key rate remains near zero even after its recent hike. As long as this gap persists, the yen is likely to remain under pressure.
What to Watch Next: Intervention Risks and BOJ Guidance
Traders are now closely watching for potential intervention by Japanese authorities. Finance Minister Shunichi Suzuki has reiterated that the government is watching currency moves with a “high sense of urgency” and will take appropriate action against excessive volatility. However, direct intervention has historically had only a short-term impact.
The next major test for the yen will come with the BOJ’s quarterly outlook report and the US inflation data due later this month. If US inflation remains sticky, the Fed may delay rate cuts, keeping the dollar strong. Conversely, any sign that the BOJ is accelerating its tightening timeline could provide a lifeline for the beleaguered yen.
