This is because the Hang Seng Index is highly correlated with fluctuations in the international market. Once there is a big fluctuation in the American market or the European market the night before, the opening of the Hang Seng Index will reflect the situation of the external market the day before, so there will often be situations where the gap is high or the gap is low.

Hang Seng Index Futures is based on Hang Seng Index, and the risk of index fluctuation is predictable. The difference is that with the connotation of futures (with margin) and the use of financial leverage, the risk will increase exponentially. The market characteristics of futures and index futures are similar, but the specific trading objects are different and the risks are relatively large.