BOJ Hikes Rate to 31-Year High, Yen Falls as Hawkish Guidance Disappoints

Investors assess global rate outlook after hawkish moves by major central banks

The Japanese yen steadied on Monday following last week's sharp decline, which had sparked concerns about potential intervention by Japanese authorities. Investors continue to evaluate the global interest rate outlook after a wave of rate hikes and hawkish signals from major central banks this month.

The yen traded at 157.04 against the U.S. dollar, after falling 2% last week. Japanese markets were closed for a three-day holiday, resulting in low liquidity and keeping traders alert to the possibility of official intervention.

Bank of Japan's Rate Hike Fails to Boost Yen

The Bank of Japan (BOJ) raised its interest rate to 1.25% on Friday—the highest level in 31 years—but the widely expected move failed to lift the yen. Two dissenting votes and a lack of clear hawkish guidance disappointed investors, triggering a sharp selloff. Reports later emerged that Japanese officials had conducted rate checks, typically seen as a precursor to currency intervention.

Beyond the BOJ, both the Federal Reserve and the European Central Bank also raised rates this month, warning that further tightening may be needed to combat inflation as the Middle East conflict enters its seventh month.

Challenges for BOJ Communication

Fred Neumann, chief Asia economist at HSBC, noted that the Fed's unanimous decision to raise rates and its hawkish signals have made communication more difficult for the BOJ.

"As a result, the bar remains high for the BOJ to convince markets of its hawkish stance and anchor expectations on the yen," Neumann said. "In the weeks and months ahead, investors may again test the BOJ's resolve to continue raising rates and follow the Fed's tightening path."

Bullish Yen Bets Under Pressure

In early September, the yen rose to its strongest level in seven months as traders bet on faster BOJ rate hikes and early signs of capital repatriation by Japanese investors. However, the currency has since given back some of those gains.

Positioning data showed that bullish sentiment toward the yen increased ahead of the BOJ meeting. Weekly data from U.S. regulators indicated that speculative traders increased their net long yen positions in the week ending September 15, with net long exposure rising to $9.7 billion—the largest since July 2025.

Thomas Mathews, head of Asia-Pacific markets at Capital Economics, said that despite the BOJ's rate hike, the market clearly views the Fed as the more hawkish of the two, at least relative to expectations at the start of the month.

"However, given that the yen is still significantly stronger than before, further weakening may be needed before intervention is back on the table," he added.

In July, the yen fell to a 40-year low of 163.99 per dollar before rare coordinated intervention by the U.S. and Japan helped boost the currency.

Focus Shifts to Fed Rate Outlook

The U.S. dollar index, which tracks the greenback against six major currencies, held steady at 100.23. The index gained over 1% last week after the Fed raised rates and signaled the possibility of further tightening.

According to the CME FedWatch Tool, traders now see a 55% probability of a rate hike at the Fed's next meeting in October, up from 42.5% a week earlier.

"We believe the midterm elections will not be a constraint on the Fed raising rates again in October," said Thomas Simons, chief U.S. economist at Jefferies. "Whether rates rise again in December will depend on data and geopolitical developments. Looking ahead to 2027, the rate path will depend on labor market performance. We expect rate cuts in the second half of 2027."

The euro traded little changed at $1.1474, after exit polls showed the far-right Alternative for Germany (AfD) finishing first in a state election in northeastern Germany, dealing a blow to Chancellor Friedrich Merz's conservative party.