Jefferies Backs AI Stock Rally as Earnings Growth Fuels 80% of S&P 500 Gains
Jefferies investment bank validates the 2026 AI stock rally, confirming that earnings growth—not speculative hype—drives 80% of S&P 500 gains. The analysis suggests the AI sector's market expansion rests on fundamental business performance rather than investor sentiment, while Samsung's achievement of $1 trillion market capitalization underscores the scale of AI-driven valuations in technology.


