S&P 500 Climbs 1.02% as AI Tech Powers 70% Gains, Q1 GDP Accelerates to 2.0%

The S&P 500 rose 1.02% on May 1, 2026, driven by AI mega-cap tech stocks contributing 70% of gains, capping April's Tech sector surge of 17%—largest since 2002—and semiconductors' 37% jump. Recovery accelerated from a March 30 near-term low amid hedge fund capitulation, Bill Ackman's bullish AI outlook on April 30, and BEA's Q1 GDP growth hitting 2.0% annualized (up from 0.5%), with AI-linked investments adding 1.3 percentage points. Strong April returns—S&P 500 +10.4%, Nasdaq +15.3%—fueled records, though historical tech surges signal pullback risks.