S&P 500 Tests Records Ahead Nvidia Results, MongoDB Rockets: What's Moving Markets Wednesday?

Wall Street traded cautiously on Wednesday, with major indices little changed at midday as investors awaited NVIDIA Corp.‘s NVDA second-quarter earnings after the bell.NVDA is performing well relative to peers. See the market dynamics here.The AI giant has more than doubled in value since April's tariff-driven low, becoming the poster child of a rally that pushed the S&P 500 to record highs this month.Traders are laser-focused on Nvidia's Blackwell chip momentum, China updates and gross margins — three fact ...