Launched on 24 November 1969, the HSI has just celebrated its 55th anniversary on the past Sunday, The Hang Seng Indexes Company issued a blog saying. Numerous constituents come and go over the past 55 years, as listed companies in Hong Kong have been going over merger & acquisitions, privatization amidst market competition. Related NewsBOCI: Southbound Capital Continues to Flow into HK BourseAmong the 33 constituents at the time of the HSI's launch in 1969, only 4 remain as HSI's constituents, namely CLP HOLDINGS (00002.HK) 0.000 (0.000%) Short selling $33.43M; Ratio 21.233% , HK & CHINA GAS (00003.HK) 0.000 (0.000%) Short selling $41.11M; Ratio 44.722% , HSBC HOLDINGS (00005.HK) 0.000 (0.000%) Short selling $344.26M; Ratio 20.144% and POWER ASSETS (00006.HK) 0.000 (0.000%) Short selling $37.01M; Ratio 35.194% .The HSI ended its first official trading day at 158.5, which increased to 20,317 on 31 October 2024r, representing a cumulative return of almost 127.2x since launch, the Hang Seng Indexes Company added.(HK stocks quote is delayed for at least 15 mins.Short Selling Data as at 2025-01-10 16:25.)