Fed-BoJ Policy Divergence Fails to Save Yen Amid Global Market Volatility

The expected divergence in monetary policy between the Federal Reserve and Bank of Japan has historically driven the USD/JPY exchange rate. However, as of late 2025, this policy gap is not providing the yen with sustained support that investors had anticipated.

Despite the Fed's restrictive stance, with interest rates at their highest level in over two decades, the yen has not weakened as sharply as some models would predict. In fact, at times it has even strengthened against the dollar. Several factors are complicating the traditional policy divergence trade.

The market participants have largely priced in the Fed's rate path, reducing the marginal impact of new hawkish signals. The Bank of Japan's gradual adjustments to its yield curve control policy have introduced uncertainty, leading to volatile but not directional moves.

Global risk sentiment, oil prices, and geopolitical events are playing an increasingly significant role in currency markets, often overshadowing interest rate differentials. As a result, the simple narrative of 'Fed hawkish, BoJ dovish equals weaker yen' is proving insufficient in the current complex environment.