Hang Seng In ‧ dex, the /ˌhæŋ ˈseŋ ˌɪndeks/ BrE AmE trademark
a number that shows how well or badly ↑ share s 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 , ↑ Nikkei index