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.
​Implied vols rose with market decline on New Year's Day, Hang Seng and HSCEI both trading at peak open interest. January historically a volatile...
​Despite holidays, average daily volumes for HSI and HSCEI remain steady. Historic vols are decreasing and below implied vols, with short expiries...