Yen Slumps to 40-Year Low Against Dollar as PBOC Sets Yuan Reference Rate at Three-Year Trough

The Japanese yen has weakened to its lowest level against the US dollar in 40 years, while the People’s Bank of China (PBOC) has set the yuan’s daily reference rate at a three-year low, signaling diverging monetary policy pressures across Asia’s two largest economies as of late March 2025.

Yen’s Historic Slide

The yen breached the 160 mark against the dollar, a level not seen since 1985, driven by the Bank of Japan’s (BOJ) continued ultra-loose monetary policy stance even as the Federal Reserve maintains elevated interest rates. The BOJ has held its benchmark rate at -0.1% while other major central banks have tightened aggressively, widening the interest rate differential that makes the yen a prime target for carry trades. Market participants are now watching for potential intervention by Japanese authorities, who have previously signaled discomfort with rapid yen depreciation.

PBOC’s Reference Rate Adjustment

China’s central bank set the yuan’s daily midpoint fixing at 7.2050 per dollar, the weakest level since early 2022, reflecting ongoing economic headwinds from a sluggish property sector recovery and weakening export demand. The PBOC has been using its daily fixing as a tool to manage depreciation expectations, allowing the yuan to weaken gradually rather than abruptly. The move comes as China’s economic data for the first quarter showed slower-than-expected growth, with industrial output and retail sales missing analyst forecasts.

Implications for Global Markets

The simultaneous weakness in Asia’s two most traded currencies is raising concerns about competitive devaluation and its ripple effects on global trade flows. A weaker yen boosts Japanese export competitiveness but increases import costs for energy and raw materials, squeezing domestic consumers. For China, a lower yuan helps offset US tariffs but risks capital outflows and inflationary pressure from more expensive imports. Emerging market currencies across Southeast Asia are also feeling the pressure, with the South Korean won and Thai baht hitting multi-year lows against the dollar.

Conclusion

The yen’s 40-year low and the PBOC’s three-year low reference rate underscore the divergent monetary policy paths between the US and Asia’s largest economies. Traders are now pricing in a higher probability of coordinated central bank action, though analysts remain divided on whether intervention would provide more than temporary relief. The currency moves add a layer of complexity to the global economic outlook, with implications for inflation, trade balances, and cross-border investment flows.

FAQs

Q1: Why is the yen falling to 40-year lows?
The Bank of Japan maintains ultra-loose monetary policy with negative interest rates while the Federal Reserve keeps rates elevated, creating a wide interest rate gap that encourages investors to sell yen for higher-yielding dollar assets.

Q2: What does the PBOC’s reference rate mean?
The PBOC sets a daily midpoint for the yuan against the dollar, and the currency is allowed to trade within a 2% band around this rate. A lower reference rate signals official tolerance for yuan depreciation.

Q3: Could Japan or China intervene in currency markets?
Japan has a history of intervening when yen moves are deemed excessive, and officials have recently escalated verbal warnings. China has multiple tools to manage yuan volatility, including state bank intervention and tighter capital controls.