美股三大指数开盘涨跌不一，科尔黛伦矿业涨3.2%

Market Overview - The U.S. stock market opened mixed on December 26, with the Dow Jones index down by 0.02%, while the S&P 500 and Nasdaq Composite indices both increased by 0.09% [1] Mining Sector - Mining stocks experienced a general increase, with Coeur Mining rising by 3.2%, Pan American Silver up by 3.68%, and Hecla Mining gaining 2.6% [1] E-commerce Sector - South Korean e-commerce company Coupang saw a significant rise of 7.6% after identifying the perpetrator behind a data leak and recovering the involved equipment [1] Pharmaceutical Sector - Biohaven Pharmaceuticals experienced a decline of 10.0% due to its depression drug failing to meet key mid-stage trial objectives [1]