Market Crosswinds: AI Selloff and Mega-Cap Pain Offset by Energy, Industrials and Defensive Rotation

$ARM — A volatile session left headline AI and mega-cap names re-pricing after guidance disappointments and earnings misses, while energy, industrials and large-cap biopharma rallied on stronger-than-expected cash flow and margin beats. The result: heightened intraday volatility, a visible sector rotation, and a Fed communication split that amplifies short‑term uncertainty.