After-hours trading in the US saw notable share swings across industrial and technology stocks, including Nucor, Waste Management, F5, and NXP. Investors reacted swiftly to quarterly earnings that revealed mixed guidance, triggering high short-term volatility. Analysts observed that sector rotations are intensifying as markets digest earnings quality and forward projections. While some companies outperformed expectations, others trimmed forecasts amid slowing demand signals. The pattern highlights an earnings-sensitive environment where valuation and margin outlook drive after-market sentiment.