Hang Seng Indexes Company Limited is a prominent provider of stock market indexes, focusing on the Hong Kong and China stock markets. Established in 1984, it is a wholly-owned subsidiary of Hang Seng Bank. The company plays a vital role in compiling and maintaining various indexes that track the performance of stocks listed on the Hong Kong Stock Exchange (HKEx) and other Chinese markets. The flagship product of Hang Seng Indexes Company is the Hang Seng Index (HSI), which is a free-float market capitalization-weighted index. It tracks the performance of the largest and most liquid stocks on the HKEx and serves as a benchmark for the Hong Kong equity market. In addition to the HSI, the company offers a range of sector-specific indexes, such as the Hang Seng Finance Index and Hang Seng Properties Index, as well as the Hang Seng Composite Index Series, which includes large-cap, mid-cap, and small-cap indexes. These products are essential tools for investors, financial institutions, and researchers.