Alibaba Health, Longfor and Haidilao to join blue chips on Hong Kong’s benchmark Hang Seng Index

• The addition of the three stocks to the index from March 15 will expand the number of constituents from 52 to 55, according to a statement from Hang Seng Indexes on Friday evening
• The Hang Seng Index will add in three more stocks, potentially paving the way for a further expansion to 80, brokers say