Hang seng index constituents weighting
Hang Seng Indexes About Hong Kong Hang Seng Index The Hang Seng Index is a free-float capitalization-weighted index of a selection of companies from the Stock Exchange of Hong Kong. The Hang Seng Index was launched on 24 Nov 1969 and backdated to 31 July 1964, with a base rate of 100. As of 31 May. 2018, the 10 largest constituents and their weighting in the Hang Seng Index are: HSBC 9.91% Tencent 9.18% AIA 9.15%