S&P 500 companies lifted March-quarter earnings 28% from a year earlier, helping drive US stocks to repeated record highs and reinforcing the rally beyond simple momentum.
AI spending is the main engine: even excluding technology firms, earnings rose 14%, profit margins reached their highest since 2009, and analysts now expect more than 20% profit growth in 2026.
Valuations remain elevated but not bubble-like, with the S&P 500 at about 20 times projected 2026 earnings versus more than 125 times for top tech stocks at the dot-com peak.
Consumer spending—about 70% of US economic activity—has stayed resilient despite inflation anxiety, while investor sentiment remains cautious over rates, geopolitics and gasoline prices.
That mix of strong profits, steady demand and lingering skepticism suggests the bull market may still have room to run, though slower earnings, labor-market weakness or policy shocks remain risks.
As the AI boom fuels both record stocks and inflation, will the Fed's rate hikes ultimately derail the tech rally?
Experts disagree: Is today’s AI-driven market a repeat of the dot-com bubble, or is this time truly different?
With a key global strait blocked, could a critical materials shortage unexpectedly halt the AI investment boom?
S&P 500 Hits Record Highs with 29.6% Projected Q2 2026 Earnings Growth, Driven by AI Boom and Market Concentration Risks
Overview
The S&P 500 is showing strong performance in Q2 2026, driven by robust corporate profits and high investor confidence in future growth. This optimism is fueled by substantial investments in AI infrastructure, as companies and investors believe these efforts will lead to real financial gains. The first-half results of 2026 have largely confirmed the market’s earnings thesis, which has been a key factor behind the recent rally. With an estimated earnings growth rate of 23.2% for the quarter, the S&P 500’s strength is underpinned by both solid fundamentals and positive expectations for the impact of AI.