Yen: Risk of BOJ Action in September Rises – Commerzbank

The risk balance for the Bank of Japan's September policy meeting is tilting. Commerzbank analyst Volkmar Baur said the latest Japanese July inflation data and strong Purchasing Managers' Index (PMI) readings indicate that price dynamics will not be an obstacle to further rate hikes by the central bank. Although his previous baseline expectation remains that the BOJ will act in the fourth quarter, Baur acknowledged that the data does not rule out an earlier rate hike in September, keeping yen policy risk in the market spotlight.

**Inflation resilience paves the way for rate hikes**

Japan's core inflation has remained above the 2% threshold for an extended period, and momentum in corporate wage increases continues, providing fundamental support for monetary policy normalization. Baur's analysis suggests that July inflation data reinforced this trend, showing that price pressures are not a temporary phenomenon. Meanwhile, strong PMI data reflects the resilience of Japanese economic activity, reducing the need for the central bank to delay rate hikes due to concerns over slowing growth. Market pricing for a September rate hike is adjusting rapidly, with some analyses suggesting the probability has surged to above 70%, though this expectation still requires further validation from upcoming data.

**Carry trades face a key variable**

Marginal shifts in yen policy expectations are now tugging at the sensitive nerves of global carry trades. The two-year USD/JPY swap spread has narrowed by nearly 40 basis points since mid-July, reflecting a market repricing of US and Japanese monetary policy paths. If the BOJ unexpectedly hikes in September, it could accelerate yen appreciation, triggering deleveraging pressure on carry positions. Market reports indicate that if the yen strengthens rapidly, assets such as US equities, tech stocks, and even gold could face short-term selling due to liquidity needs, creating a cross-asset contagion effect.

**Focus on policy signals ahead**

USD/JPY is currently trading around 158.8288, with the market closely watching public comments from BOJ officials and subsequent economic data. Baur maintains his baseline view of a fourth-quarter rate hike, but the risk of September action cannot be ignored. Over a longer cycle, Japan's fiscal pressures, US Treasury yield risks, and shifts in global liquidity structures could still bring complex effects on the yen's trajectory, and investors should be wary of amplified volatility from short-term deleveraging.