S&P 500 2025 gain driven by Nvidia, Palantir, Alphabet and AI chip and data stocks

The S&P 500 is on track to close 2025 with a 17% year-to-date rise, led by AI-related names such as Nvidia, Palantir, and major data center and storage companies. High spending plans from Microsoft, Amazon, Alphabet, and Meta supported rallies in chip, infrastructure, and new index entrants, while consumer, retail, and managed care stocks suffered steep losses. Single-stock surges and sharp declines created a market split between a handful of extreme winners and notable laggards.