Shares in the aluminum sector are mostly trading higher. At the time of writing, CHALCO (HKEX: 02600) rose 3.4% to HK$11.25.

CHINAHONGQIAO (HKEX: 01378) gained 3.36% to HK$29.52.

NANSHAN AL INTL (HKEX: 02610) increased by 1.27% to HK$36.7.

Recent reports indicate that Guinea is expected to implement bauxite export control measures in June. This news has significantly driven up alumina prices, which have exceeded 2,800 yuan per ton, reaching a recent high.

Analysis suggests that Guinea's potential export quota policy in 2026 could reduce its export volume by approximately 30 million tons to 150 million tons, representing a decrease of about 18%. This is anticipated to create a marginal tightening in domestic bauxite supply, potentially driving up prices for alumina and primary aluminum from both a cost and sentiment perspective.