U.S. stock markets ended the week mostly in negative territory, as early fourth-quarter earnings failed to offset broader market caution. While large-cap indexes struggled, small-cap stocks stood out, extending a powerful rally that reflects growing confidence in the U.S. economic outlook. The Dow Jones Industrial Average slipped 83 points on Friday and finished the week down 0.3%. The $S&P 500(.SPX)$ and Nasdaq Composite ended the week lower by 0.4% and 0.7%, respectively. In contrast, the Russell 2000 surged 2% for the week, closing at a record high. IWM Small Caps Take the Lead Small Caps The standout theme of the week was the continued rotation into small-cap stocks. Investors have increasingly moved away from expensive large-cap names, fa