The Japanese yen fell to 160.324 per dollar, reaching its weakest point since July 2024 and maintaining concerns about intervention. This decline occurred despite the Bank of Japan's recent decision to raise its policy rate by 25 basis points to 1.00%, the highest in 31 years. The market's muted reaction to the rate hike indicates skepticism regarding the pace of policy normalization in Japan.

Analysts note that while a rate hike typically strengthens a currency, the yen's weakness persists due to the significant interest rate differential between Japan and the United States. Even at 1.00%, Japan's rates remain substantially lower than those in the US and Europe, encouraging traders to seek higher yields abroad. Speculative trading, particularly from leveraged funds aggressively building short yen positions, is also contributing to the currency's depreciation, rather than fundamental economic factors.

The persistent weakness has put Japanese officials on high alert for potential market intervention. The dollar/yen pairing is approaching the 161-162 zone, a level that has historically triggered official action to stabilize the currency. However, unlike previous interventions in 2022 and July 2024, which were accompanied by falling US yields, the current environment is characterized by rising US Treasury yields and increased probabilities of Federal Reserve rate hikes, creating a more challenging landscape for yen appreciation.