USD/JPY Soars 0.54% as Fed and BoJ Policy Decisions Loom

The USD/JPY currency pair experienced a significant increase on September 15, rising by 0.54% to $155.167. This upward momentum was largely driven by a rebound in the U.S. dollar and elevated U.S. Treasury yields ahead of monetary policy decisions from both the Federal Reserve and the Bank of Japan.

The recent U.S. inflation figures highlighted sticky underlying price pressures, reinforcing expectations that the Federal Reserve will maintain a restrictive monetary stance. As a result, U.S. Treasury yields remained firm across the curve, providing fundamental backing for the dollar and encouraging greenback buying against the lower-yielding yen.

On the Japanese side, the yen faced headwinds as market participants reassessed aggressive pricing surrounding the Bank of Japan's rate-hiking trajectory. With money markets having priced in a relatively steep path of Japanese rate increases, asymmetric disappointment risk prompted a tactical rebalancing out of recent yen longs, lifting USD/JPY higher.

Broad macro fundamentals continue to highlight a persistent interest-rate differential between U.S. and Japanese sovereign debt. Elevated U.S. yields, supported by firm economic activity and persistent fiscal borrowing needs, keep the carry-trade dynamic structurally supportive of the U.S. dollar.