The Nasdaq Composite Index finished up 0.8 percent at 16,103.45. The Dow Jones Industrial Average gained 0.2 percent to 38,790.43, while the broad-based S&P 500 climbed 0.6 percent to 5,149.42. Investor buzz was high ahead of Nvidia’s GTC 2024 gathering, an annual developers’ conference for one of the biggest players in AI.