Asia markets are mixed ahead of Bank of Japan rate decision, China business activity data

Asia-Pacific markets were mixed on Wednesday as investors awaited the Bank of Japan's rate decision and China's business activity data.

Economists polled by Reuters expecting the bank to raise rates to 0.1%, though other analysts are expecting a larger hike. The BOJ's benchmark interest rate currently is in a range of 0% to 0.1%.

Should the bank raise rates, this will mark the first time since 2010 that its benchmark interest rate stands firmly at 0.1% or higher.

Australia's second-quarter inflation numbers are also in focus for clues on the Reserve Bank of Australia's moves at its next monetary policy meeting on Aug. 6.

Japan's Nikkei 225 fell 0.84% ahead of the BOJ decision, while the broad-based Topix was down 0.4%, with both indexes paring some losses. The country's retail sales climbed 3.7% year on year in June, beating expectations of a 3.2% rise from economists polled by Reuters.

South Korea's Kospi rose 0.48%, with heavyweight Samsung Electronics up 0.74% as the firm reported a whopping 1,458.2% year on year rise in second-quarter operating profit. The small-cap Kosdaq was close to the flatline.

Australia's S&P/ASX 200 was up 0.61%.

Hong Kong Hang Seng index futures were at 17,046, higher than the HSI's last close of 17,002.91.

Separately, China's securities regulatory commission has replaced vice chairman Fang Xinghai with Li Ming, its inspection bureau chief. Fang has been in the role of CSRC vice chairman since 2015. The state-run Global Times, citing local media, reported that Fang was retiring.

Overnight in the U.S., the S&P 500 was dragged lower by declines in megacap tech stocks, as investors braced for quarterly reports from names in that cohort. Traders also set their eyes on Washington as the Federal Reserve