Yen Weakens as BOJ Summary Falls Short of Hawkish Expectations

The Japanese yen has weakened to its lowest level in a month, falling past 158 per dollar. The decline comes as the Bank of Japan's September meeting summary failed to meet investors' expectations for stronger hawkish signals from policymakers.

The BOJ summary showed that the central bank is shifting its focus towards preventing inflation from exceeding its target. This led to speculation about another rate increase this year, but provided little clarity on the timing ahead of policy meetings in October and December.

The yen's weakness was also attributed to a stronger dollar and elevated Treasury yields, which have increased expectations that the Federal Reserve may need to raise interest rates further to contain energy-driven inflation. This supports the prospect of wider US-Japan interest-rate differentials, as the Fed's tightening cycle continues to outpace the BOJ's rate hikes.