Core Viewpoint - The significant rebound in alumina prices is primarily driven by disruptions in Guinea's mining policies, particularly the revocation of mining licenses, which has notably impacted supply dynamics [2][10]. Group 1: Supply Disruptions - Guinea's mining authority issued a work stoppage order for the Axis mining area, affecting an annual capacity of approximately 40 million tons, with a 2024 production estimate of 23 million tons [3]. - The revocation of mining licenses for 46 companies in Guinea has escalated supply concerns, leading to a sharp increase in alumina futures prices [3][4]. - Guinea is the largest bauxite producer globally, with its output accounting for 69.4% of China's alumina imports, making it a critical supplier [4]. Group 2: Domestic Production and Capacity - As of May 15, the total built capacity for metallurgical-grade alumina in China is 10,922 million tons per year, with an operating capacity of 8,412 million tons per year, reflecting a decrease in the operating rate to 77.02% [6]. - The decline in domestic alumina production is attributed to significant profit drops, with average operating rates falling from 86.1% in March to 84.6% in April [6][7]. - The industry is currently experiencing low operating rates, with planned maintenance and project delays contributing to reduced supply pressure [7]. Group 3: Price Trends and Future Outlook - Short-term alumina prices are expected to remain strong due to supply disruptions and a tightening market, although medium-term oversupply risks persist [8][10]. - The anticipated addition of 1.14 million tons of new alumina capacity in China by 2025, along with 400,000 tons from overseas, may outpace demand growth, leading to potential price pressures [8]. - Key factors to monitor include the ongoing developments in Guinea's mining policies, domestic production capacity changes, and the operating rates of downstream electrolytic aluminum plants [9][10].