The Hang Seng Index is a free-float capitalization-weighted index of a selection of companies from the Stock Exchange of Hong Kong. The components of the index are divided into four subindices: Commerce and Industry, Finance, Utilities, and Properties. The index was developed with a base level of 100 as of July 31, 1964.
​HSI closed sharply lower after four consecutive down days, with option volumes rising and Puts dominating activity. Implied vols fell, showing no...