Aluminum sector stocks experienced a collective surge. At the time of writing, NANSHAN AL INTL (02610) rose 13.34% to HK$37.04; CHALCO (02600) increased 5.89% to HK$11.51; CHINAHONGQIAO (01378) gained 1.62% to HK$30.1.

The catalyst for the move is news that Guinea plans to formally implement export controls and reform measures targeting bauxite in June. The core objective is to curb the decline in mineral prices and promote a recovery by controlling the total export volume. Guinea's Minister of Mines and Geology, Bouna Sylla, recently emphasized the government's principle that "supply must never exceed demand," aiming to pull prices back to reasonable levels by regulating exports. Public data indicates Guinea accounts for over one-third of global bauxite production.

On May 26th, influenced by the news of Guinea's planned export restrictions, alumina futures saw a significant increase. Dongwu Futures noted that current alumina valuations are at low levels, making market sentiment highly susceptible to news-driven factors. Furthermore, with substantial profits in electrolytic aluminum production, demand-side pressure on alumina's upward movement is relatively limited, suggesting some room for a rebound. However, sustained upward momentum may be constrained by oversupply pressures, and the market will need to monitor the subsequent intensity of Guinea's export controls.