US Stocks: Nasdaq, S&P end lower as tech megacap declines outweigh upbeat chip outlook

US equity markets closed with divergent signals as the Nasdaq and S&P 500 declined despite positive semiconductor earnings, indicating a tactical shift away from mega-cap technology exposure. The decline was driven by renewed concerns regarding capital intensity in AI infrastructure buildouts, with large-cap names like AAPL, GOOGL, and MSFT experiencing notable pressure relative to the broader index composition.

The simultaneous strength in chipmaker earnings (evidenced by strong Micron performance) versus weakness in software and services giants reveals a valuation reversion dynamic within the tech sector itself. Markets are pricing in duration risk as higher-for-longer rate expectations emerge from fresh inflation and GDP data, disadvantaging unprofitable growth narratives while benefiting cyclical hardware manufacturers.

The Dow's relative outperformance signals defensive rotation into value and cyclical exposure, a pattern consistent with rising real yields and Fed uncertainty. Investors appear to be reassessing whether mega-cap AI spending translates to near-term profitability or represents speculative capital allocation, creating bifurcation between infrastructure beneficiaries and software/services incumbents.

Sector implication: Technology sector faces headwinds from both macro (Fed policy uncertainty, inflation persistence) and micro (capital discipline questioning) factors. Communication services face particular vulnerability given valuation multiples and free cash flow concerns. Industrials and materials may benefit from infrastructure spending, while traditional semiconductors could see continued support if capex budgets remain elevated despite profitability concerns in AI software.