精选70MarketWatch（RSS）股市
2026上半年标普500跌幅最大20只股票
20 stocks in the S&P 500 that plunged the most in 2026’s first half
These companies were hit hard as investors worried about eventual losses of market share to AI tools.
更进一步：量化金融体系
看懂新闻只是起点——沿量化金融路径，把它变成能交付的工程能力