Canadian government is applying security updates to patch a vulnerability.

South Korea's KOSPI fell 201.89 points, or 3.52%, to 5,533.77 on Thursday, its lowest close since April 7, as chipmakers led losses amid profit-taking and renewed skepticism over the global AI investment boom. The drop followed a 3.3% rally on Wednesday, the index's biggest one-day gain in six weeks. A hawkish Bank of Korea stance also reinforced expectations of further rate hikes. Earnings from Meta and Tesla failed to deliver the same market lift as results linked to SpaceX and SMCI, leaving chip stocks vulnerable to a pullback.

中國上證綜指10月22日（週四）收盤下跌55.0點，跌幅：1.48%，報3658.03點； 中國深證成指10月22日（週四）收盤下跌347.03點，跌幅：2.97%，報11357.32點； 中國滬深300指數10月22日（週四）收盤下跌75.64點，跌幅：1.84%，報4036.3點； 中國創業板指數10月22日（週四）收盤下跌117.81點，跌幅：4.37%，報2576.9點； 中國科創50指數10月22日（週四）收盤下跌37.41點，跌幅：2.78%，報1305.87點。