Asia-Pacific stock markets opened mostly higher on Wednesday, with South Korea's KOSPI index leading the region's gains, surging more than 5%, while the KOSDAQ index rose 2%. Japan's Nikkei 225 added 0.34% and Australia's S&P/ASX 200 gained 0.12%. Hong Kong's Hang Seng Index fell 0.66% and China's CSI 300 edged up 0.15%. Investors continue to monitor the conflict in the Middle East and persistently rising oil prices, with Brent crude up 2% to settle at 91.01 dollars a barrel and US WTI crude up 2% to close at 84.91 dollars a barrel.