AI Rally Fuels Nasdaq and S&P 500 as Tech Megacaps Surge

Global indices are tracking a fresh leg higher as AI infrastructure demand reshapes sentiment across major benchmarks. Reports that SpaceX's computing capacity is being snapped up at record pace have reignited the broader AI trade, with index-heavy tech constituents leading gains on the Nasdaq Composite and S&P 500.

The spillover effect is notable: hardware and server names tied to AI buildouts are pulling index futures upward in pre-market trading. Because mega-cap tech carries outsized weighting in both the S&P 500 and Nasdaq 100, any surge in this cohort tends to mechanically lift the entire index, masking weaker breadth beneath the surface.

Traders watching index-level technicals should note that concentration risk remains elevated — a handful of AI-linked names are doing most of the heavy lifting for headline index gains.