On Wednesday, investors treated the midterm results as good news. On Thursday, they treated them as a threat to the artificial-intelligence buildout. Friday brought only a partial rebound, and stocks ended election week lower.
In the week ended Nov. 6, the Nasdaq Composite fell 3.4 percent, the S&P 500 lost 2.7 percent and the Dow Jones Industrial Average slipped 0.9 percent, CNBC reported. Most of the damage came in one session. On Thursday the Nasdaq dropped 5.5 percent, the S&P 500 4.4 percent and the Dow 3.4 percent, reversing Wednesday's rally. All 11 S&P 500 sectors fell, and AI infrastructure stocks led the decline.