Zijin Gold International (02259.HK) saw its stock price surge by 5.09% in Friday's pre-market trading, following the announcement of its inclusion in the Hang Seng Composite Index. This significant move highlights the growing importance of the gold miner in the Hong Kong stock market.

The Hang Seng Index Company announced that Zijin Gold International will be added to several key indices, including the Hang Seng Composite Index, Hang Seng Composite Industry Index - Materials, Hang Seng Composite LargeCap Index, and Hang Seng Composite LargeCap & MidCap Index. The changes will take effect after the market close on October 15, 2025, with the new composition being implemented on October 16, 2025.

Zijin Gold International, a unit of Zijin Mining (02899.HK, 601899.SH) that holds the company's gold assets, only recently made its debut on the Hong Kong Stock Exchange on Monday. The swift inclusion in these prominent indices is likely to boost the stock's visibility and attract more institutional investors, potentially explaining the sharp rise in its share price. As index funds and ETFs tracking these indices will need to add Zijin Gold International to their portfolios, the increased demand for the stock is expected to support its price in the near term.