Hong Kong Hang Seng Index futures T+0 can be bought on the same day and sold on the same day. It can be traded many times, and it can be long or short. Hong Kong Hang Seng Index futures trading hours are: 9: 00 a.m.15-12: 00 a.m.13: 00 a.m.-16: 30 a.m., and night trading is 6544.