Yen Hits Near 40-Year Low as Fed-BoJ Rate Gap Fuels Carry Trade

The Japanese yen has reached levels not seen in nearly four decades as the interest rate gap between the Federal Reserve and the Bank of Japan continues to fuel demand for the carry trade. As of late March 2025, the USD/JPY pair is trading around 152.00.

The core driver of the yen's weakness is the wide differential between U.S. and Japanese interest rates. The Federal Reserve has maintained its benchmark rate at 5.25%-5.50%, while the Bank of Japan has kept its short-term rate at -0.1%. This gap incentivizes traders to borrow yen at ultra-low rates and invest in higher-yielding U.S. assets.

A persistently weak yen has mixed effects on the Japanese economy. On one hand, it boosts profits for major exporters like Toyota and Sony. On the other hand, it increases the cost of imported energy and raw materials, squeezing household budgets and small businesses.