Nomura Warns: US Stock Index "Severely Distorted," Ten Stocks Drive 70% of S&P Gains, Beware Diesel's New Shock

McElligott believes the S&P 500 is trapped in a "hallucinatory boom": 85% of its components have pulled back (one-sixth halved). More dangerously, current market correlation is so low that it has only been seen historically before the 2007 financial crisis and during the 2018 "volmageddon." The market faces two hidden landmines: first, OpenAI's revenue miss (only 30% of expectations) undermines the foundation of the AI narrative; second, structural refinery shortages make "diesel spreads = interest rate volatility," an invisible bomb.