Yen Slips to 157.20 as US Dollar Holds Steady

The Japanese yen fell to 157.20 per dollar on Monday as traders braced for possible intervention. The currency slid after the Bank of Japan raised rates to their highest level in 31 years.

US dollar strength persisted despite the BOJ move, supported by hawkish signals from global central banks. The dollar index remained steady at 100.23, reflecting continued confidence in US monetary policy.

BOJ Rate Hike Lacks Conviction

The BOJ lifted rates to 1.25 percent, yet two dissenting votes dampened market enthusiasm. Investors remained reluctant to buy the yen due to the lack of explicit hawkish guidance. This hesitation allowed the dollar to maintain its 0.2 percent gain against the yen.

Reports of rate checks by Japanese officials signaled a potential precursor to currency intervention. Such actions typically aim to curb excessive yen weakness. Analysts at MUFG noted these checks should limit further downward pressure on the currency.

Speculators Hold Record Long Positions

Investors increased net long-yen positions to US$9.7 billion in the week ending September 15. This marked the largest exposure since July 2025, according to US regulatory data. Traders had bet on a faster pace of BOJ hikes and capital repatriation.

However, the yen has surrendered some of its early September gains. The currency had firmed to a seven-month high before pulling back. HSBC economists argue the Fed’s unanimous hike raises the bar for BOJ credibility.

Fed Hawkishness Anchors Dollar Value

Markets now price a 55 percent chance of a Fed rate hike in October. This probability rose from 43 percent a week earlier, per the CME FedWatch tool. The Fed and ECB both warned that further tightening may be needed to combat inflation.

Capital Economics notes the market views the Fed as more hawkish than the BOJ. Consequently, the yen may need to slide further before intervention becomes likely. The Business Times reports that traders remain vigilant for signs of Tokyo stepping into the market.