Summary · why it matters
Stocks rose through a turbulent first half of 2026, and experts see more gains and volatility ahead as a resilient economy and massive AI investments support strong earnings growth. The S&P 500 is up more than 7% this year, with profits surging 28% year-over-year in the first quarter, the fastest pace since 2021. Analysts have raised full-year S&P 500 earnings estimates by about 10% since the start of the year, an unprecedented increase typically seen only after a shock or post-recession, according to JPMorgan. The driving force is the AI data center boom, with hyperscalers expected to spend well over $700 billion on capital expenditures in 2026, benefiting chip designers, memory suppliers, and companies across industrials, materials, utilities, and tech. However, experts warn of potential bumps from inflation fears, possible interest rate hikes, speculative excesses, and upcoming IPOs from AI labs, while recommending selective stock picks focused on AI-exposed companies with strong balance sheets and pricing power.