1998年4月20號推出恒生100指數及恒生50中型股指數，5月推出網頁。2001年10月3號推出恒生綜合指數，同日再推出恒生行業分類系統。2002年推出恒生流通指數。2003年起提供恒生一系列指數成交額。2005年檢討H股係咪可以加入為生指數成分股，同埋推出新嘅剔除停牌成分股嘅政策。2006年6月30號宣佈更改生指數加入H股後嘅計算方法同對現有成分股嘅數目同影響（根據資料，部分生指數成分股好似匯豐控股(香港交易所：0005)啲比重將會下降，而其他成分股好似中國移動(香港交易所：0941)嘅比重則上升），9月11號推出新嘅股票停牌處理方法，11月27號推出生中國H股金融行業指數。2011年9月5號推出，「恒生可持續發展企業基準指數」同「恒生A股可持續發展企業基準指數」，成分股分別有68隻同埋28隻。2011年9月5號推出，恒生外國公司綜合指數同恒生環球綜合指數，分別反映香港上市嘅外國公司表現同整體香港上市公司（包括外國公司）嘅表現，普拉達（Prada）（1913）、新秀麗（Samsonite）（1910）、嘉能可（Glencore）（0805）均為成分股。2012年12月10號推出恆生高股息率指數，指數包括恆生綜合指數同房產基金指數內、50隻最高淨股息率、同埋喺過去三年均維持派息嘅大型股同中型股。
The Hang Seng 100 Index and the Hang Seng 50 MidCap Index were launched on 20 April 1998, and the website was launched in May. The Hang Seng Composite Index was launched on 3 October 2001, followed by the Hang Seng Industry Classification System on the same day. In 2002, the Hang Seng Liquidity Index was launched. Since 2003, it has provided a series of Hang Seng index turnovers. In 2005, we reviewed whether H-shares could be added as constituents of the index and introduced a new policy to remove suspended constituents. On 30 June 2006, it was announced that the calculation method of the Birth Index after the addition of H shares and the number and impact on the existing constituents (according to the data, the weighting of some of the Birth Index constituents such as HSBC Holdings (HKEX: 0005) will decrease, while the weighting of other constituents such as China Mobile (HKEX: 0941) will increase), a new method of stock suspension will be introduced on 11 September, and the China H-share Financial Sector Index will be launched on 27 November. Launched on 5 September 2011, the "Hang Seng Corporate Sustainability Benchmark Index" and the "Hang Seng A-share Corporate Sustainability Benchmark Index" have 68 and 28 constituent stocks respectively. Launched on 5 September 2011, the Hang Seng Foreign Companies Composite Index and the Hang Seng Global Composite Index reflect the performance of foreign companies listed in Hong Kong and the performance of Hong Kong-listed companies (including foreign companies) as a whole, respectively, with Prada (1913), Samsonite (1910) and Glencore (0805) being constituent stocks. On 10 December 2012, the Hang Seng High Dividend Yield Index was launched, which includes the 50 highest net dividend yields in the Hang Seng Index and the REIT Index, as well as large and mid-cap stocks that have maintained dividends for the past three years.