Japan 2.1% CPI forecast raises BOJ rate stakes

Japan is due to release September CPI data, with SMBC Nikko Securities forecasting core inflation at 2.1%, up from 1.7% in August. The yen traded near ¥158 before the Bank of Japan's Oct. 29-30 meeting.

The figure matters for rates because core inflation above the BOJ's 2% price target would keep pressure on policymakers to explain how long they can hold borrowing costs steady. The supplied material did not give a consensus forecast, bond-yield move or the exact release date for the CPI report.

BOJ meeting nears

SMBC Nikko Securities' forecast puts the September core CPI rate 0.4 percentage point above August's reading. Core CPI strips out volatile items and is closely watched by the BOJ when assessing whether price gains are broad enough to affect policy.

For global markets, a firmer inflation print would feed into the rates channel through expectations for Japanese government bond yields and the yen.

If the 2.1% forecast holds, traders may give more weight to a less accommodative BOJ stance; if the print falls back toward August's 1.7%, the case for patience would be easier for the central bank to defend.

The company at the center of the forecast is SMBC Nikko Securities, whose call frames the pre-meeting inflation risk for clients. Banks and brokers exposed to Japanese rates would be affected through trading volumes, hedging demand and client positioning around the policy decision.

The next dated catalyst is the Bank of Japan's Oct. 29-30 meeting, when policymakers will have to weigh the CPI data against the yen's level and domestic price trends.