S&P 500, Nasdaq end with strong gains, rebounding from global market sell-off

The S&P 500 and Nasdaq rose by 1% as investors returned following a major sell-off. Strong comments from Federal Reserve officials alleviated recession concerns. Traders expect rate cuts in the next Fed meeting. Nvidia boosted indices, while Uber and Caterpillar reported positive earnings. The Nasdaq is up 9% in 2024.