The Hang Seng index is the oldest and most familiar Hong Kong market index, which is calculated by capitalization-weighted method.

In Hong Kong, the Hang Seng index futures contracts are the most popular products. The products trade through a new generation of automated trading system (HKATS), instead of the form of open outcry market. The settlement price is an integer, based on the average value of the hang Seng index in the last trading day.

The market maker system is provided by Hong Kong Futures Exchange to investors for hang Seng index options.

Besides, H-shares Index Futures are the other popular trading products.