Hong Kong 33 is a CFD product offered by OANDA with the Hang Seng Index (HSI) as its underlying reference asset. The Hang Seng Index is a stock market index in Hong Kong, which began publication in 1969 with a composition of 33 companies. It is a representative stock index in Hong Kong.

The number of constituent stocks has been gradually increasing, with the aim of reaching 100 companies in the future.

Further reading: What are stock market indices? How to invest in them?