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 NewsG Sachs Raises 2025 HK Stocks' Southbound Inflow Forecast to US$110BAmong 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) +0.450 (+0.679%) Short selling $19.76M; Ratio 6.942% , HK & CHINA GAS (00003.HK) +0.040 (+0.572%) Short selling $34.67M; Ratio 22.199% , HSBC HOLDINGS (00005.HK) -0.900 (-1.033%) Short selling $169.89M; Ratio 10.107% and POWER ASSETS (00006.HK) 0.000 (0.000%) Short selling $24.80M; Ratio 21.343% .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 2025-05-02 16:25.)