On May 29, Chalco (02600.HK) rose 3.32% in regular trading, trading at HK$11.2/share, with trading volume of HK$191 million.

On the news front, the world's largest bauxite producer Guinea previously announced plans to implement export controls in June, aiming to curb price declines by limiting supply volumes. Guinea accounts for over one-third of global bauxite production, and the policy has strengthened expectations of tightening aluminum resource supply. Simultaneously, Chalco is set to be officially included in the Hang Seng Index constituents effective June 8, with passive fund allocation demand providing additional support.

The stock had hit the daily limit on May 26 driven by these dual catalysts, followed by two consecutive days of pullback as short-term profit-taking was absorbed. Today's movement suggests stabilization after the correction, with sector peer Nanshan Aluminium International rising 2.62% in tandem.

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