7月14日电，美国铝业公司股价下跌4.5%，公司在西班牙的铝冶炼厂重启推迟到2026年中。

Group 1 - The core point of the article is that the stock price of the company, Alcoa Corporation, has dropped by 4.5% due to the delay in the restart of its aluminum smelter in Spain, which is now postponed to mid-2026 [1] Group 2 - The delay in the smelter restart could impact the company's production capacity and revenue projections in the near term [1] - The postponement may also affect the overall aluminum supply chain and market dynamics in the region [1] - Investors may need to reassess their outlook on the company's performance given the extended timeline for operational recovery [1]