Wall Street halts 3-day slide; Nvidia +3% on AI optimism, war and oil risks persist

US equities snapped a three-day losing streak, led by Nvidia's 3% gain, as investors weighed AI-driven growth optimism against ongoing war concerns, rising oil prices, and potential rate hikes. The move reflects a tentative risk-on tilt amid persistent macro headwinds, with analysts citing AI acceleration as a counterweight.