S&P 500 and Nasdaq Composite climbed to new record highs as investor enthusiasm around artificial intelligence and stronger-than-expected corporate earnings continued to drive gains across U.S. equities. The rally, which intensified in early May 2026, was led by chipmakers and technology stocks benefiting from surging demand for AI infrastructure, as reported by Reuters.
AI-related companies including AMD, Intel, Micron Technology, and other semiconductor firms posted strong gains after upbeat earnings forecasts and rising data centre demand reinforced confidence in the sector. The Philadelphia Semiconductor Index has surged sharply this year, reflecting the market’s continued focus on AI-driven growth, according to The Wall Street Journal.
Investor sentiment was also supported by resilient U.S. economic data and strong quarterly earnings results. More than 80% of S&P 500 companies reporting results have beaten analyst expectations, marking one of the strongest earnings seasons in recent years, as highlighted by Reuters and market analysts.
Major Wall Street firms have since raised their market targets, with RBC Capital Markets increasing its year-end forecast for the S&P 500 on expectations that AI spending and earnings growth will continue supporting equities. Analysts, however, caution that risks remain, including inflation concerns, geopolitical tensions, and questions around whether AI-related valuations are becoming overstretched.
