Hang Seng Index's Largest One-day Decline

On October 26, 1987, Hong Kong Hang Seng index was down 33.3 percent in a single day, is the largest-ever single-day fall.

The Hang Seng Index (abbreviated: HSI) is a freefloat-adjusted market capitalization-weighted stock market index in Hong Kong. It is used to record and monitor daily changes of the largest companies of the Hong Kong stock market and is the main indicator of the overall market performance in Hong Kong. These 45 companies represent about 67% of capitalization of the Hong Kong Stock Exchange.

HSI was started on November 24, 1969, and is currently compiled and maintained by HSI Services Limited, which is a wholly owned subsidiary of Hang Seng Bank, the largest bank registered and listed in Hong Kong in terms of market capitalisation. It is responsible for compiling, publishing and managing the Hang Seng Index and a range of other stock indexes, such as Hang Seng China AH Index Series, Hang Seng China Enterprises Index, Hang Seng China H-Financials Index, Hang Seng Composite Index Series, Hang Seng Freefloat Index Series and Hang Seng Total Return Index Series.

Originally Posted: China Business Daily
Author: Angulo Fu