From Longman Dictionary of Contemporary EnglishHang Seng Index, thethe Hang Seng IndexHang Seng In‧dex, the /ˌhæŋ ˈseŋ ˌɪndeks/ trademark a number that shows how well or badly shares in companies have performed on the stock exchange in Hong Kong on a particular day. The number is based on the share prices of large companies. → Dow Jones Average, FT 100 Share Index, the, Nikkei index, theFrom Longman Business DictionaryHang Seng IndexˌHang ˈSeng ˌIndex (also Hang Seng) [singular]FINANCE an index of the shares of Hong Kong’s 100 largest companiesThe Hang Seng Index closed 315.29 points down. → index
