BoJ Hawkish Shift and Rising Yields Fuel Yen's Durable Recovery

The Japanese yen has strengthened in September, with the USD/JPY falling sharply as traders reassess the outlook for Bank of Japan monetary policy. The currency surged nearly 1.5% on Thursday to around 156.349 per dollar at its lowest level of the day so far, its strongest level in roughly a month.

The move has revived speculation that Japanese authorities may have intervened in the foreign-exchange market, although the latest price action appears more consistent with a shift in monetary-policy expectations than the abrupt moves normally associated with intervention.

BoJ board member Hajime Takata delivered an unusually hawkish message this week, arguing that the central bank should adjust interest rates 'nimbly' rather than follow a predetermined schedule of roughly two increases per year. The BoJ could raise rates as soon as its September 18 meeting and policymakers are considering a faster pace of tightening thereafter.

A faster BoJ hiking cycle would begin to challenge the carry-trade dynamic, where investors borrow yen and invest in higher-yielding assets elsewhere due to the enormous interest-rate differential between Japan and the United States. Japanese bond yields have also added another layer of support for the yen's recovery, with Japan's benchmark 10-year yield reaching 3% this week for the first time since 1996.

The threat of intervention remains a major risk for Dollar bulls, as Japan and the US carried out a rare joint yen-buying intervention on July 31. Friday's nonfarm payrolls report is also crucial in determining the outlook for the USD/JPY pair.