The American stock market showed mixed results at the start of the week, with different segments performing inconsistently. Key indices displayed divergent behaviors, influenced by recent corporate signals. Dow Jones dropped 0.6%, while S&P 500 gained 0.27% and Nasdaq rose 0.5%. Notably, Corning surged 7.8% on Meta's investment news, and General Motors increased by 5.4% due to strong quarterly results, highlighting the impact of corporate news on stock prices amidst uncertain market sentiment.