US stocks today: Nasdaq ends lower as chip weakness offsets solid earnings, economic data

U.S. equity markets experienced a mixed session where semiconductor weakness dominated price action, dragging both the Nasdaq and S&P 500 lower despite positive macroeconomic signals. Chipmakers like WDC and STX faced sector-wide headwinds, suggesting either demand concerns or valuation reassessment within the semiconductor complex. This divergence highlights the market's current preference for rotation away from heavyweight tech positions.

The session revealed a resilience-weakness paradox: solid earnings reports, robust retail sales data, and healthy labor metrics typically support risk appetite, yet investors capitalized on these gains to de-risk from high-beta semiconductor exposure. This pattern indicates growing caution about the sustainability of current tech valuations relative to macroeconomic fundamentals, despite economic data supporting continued corporate profitability.

Geopolitical pressure from escalating U.S.-Iran tensions and rising crude prices added a secondary drag, creating a multi-factor headwind environment. Energy sector strength from oil price gains was insufficient to offset technology losses, suggesting market breadth deteriorated despite underlying economic strength. Healthcare's modest gains failed to provide significant offsetting support.

Sector implication: The negative correlation between economic strength and equity performance signals potential investor concern about future rate trajectory or margin compression in growth sectors. Semiconductor underperformance despite solid earnings may reflect profit-taking ahead of potential guidance resets, while defensive and cyclical rotation possibilities remain constrained by geopolitical uncertainty.