BOJ Intervention Fails to Stem Yen's Rate Problem

The Bank of Japan's (BOJ) intervention in the foreign exchange market has driven the yen up by as much as 3.6%, but it remains to be seen whether this will have a lasting impact on the currency.

Despite the BOJ's hawkish rhetoric, with Governor Kazuo Ueda stating that underlying inflation is approaching 2% and could move clearly above 2% during the second half of fiscal 2026, the policy rate remains at 1.0%, leaving a large gap in interest rates between Japan and the US.

This has resulted in a substantial differential in yield spreads, with the 10-year JGB yielding around 1.505% compared to 4.233% for the US 10-year Treasury, making it more attractive to invest in dollars rather than yen.

The intervention has also exposed a policy contradiction, as the government intervened just before the BOJ left rates unchanged, which could lead to further yen weakness if domestic policy does not support a stronger currency.