HONG KONG (Aug 14): Hong Kong’s Hang Seng Index may announce the long-awaited inclusion of tech giant Alibaba Group Holding Ltd. in one of the biggest revamps in its 50-year history.

After trading ends Friday, Hang Seng Indexes Co. is due to unveil the first major changes under new rules to allow dual-class shares and secondary listings. Among stocks that are now eligible to be included are Alibaba, China’s largest food delivery website Meituan Dianping and Xiaomi Corp. The index compiler takes various factors into account, including market capitalization and turnover.