Chinese shares opening lower: Shanghai Composite -0.95%, Hong Kong's Hang Seng -0.97%More broadly:South Korea halted KOSPI equity index futures trade after a 5% dropKorea Exchange activates sidecar on KOSDAQ after KOSDAQ 150 futures Japan's benchmark Nikkei 225 index has fallen more than 5% from its record high hit just yesterdayBitcoin is back below US$100,000 This article was written by Eamonn Sheridan at investinglive.com.