US Stocks Rise on Nvidia Gain, Tech Earnings Test AI Spending

US stocks closed higher Monday despite market volatility, with the S&P 500 up 0.7%, the Dow up 110 points, and the Nasdaq up 0.9%, led by Nvidia's 2.5% gain. Nvidia's surge helped erase last week's losses, but AI sector concerns persist over high financing costs for data centers and chips. Meta's plan to raise up to $35 billion in stock, with chipmakers potentially buying $5 billion, raised circular financing worries. This week's "super earnings" season features Alphabet, Microsoft, and Amazon reports, which will test whether AI investments translate into productivity. Nearly one-third of S&P 500 companies also report, while Brent crude fell 0.9% to $110.74 per barrel.