Nasdaq-100 Falls 10 Percent Into Third 2024 Correction on AI Valuation Reset

The index decline concentrated in semiconductor and software names that had driven prior gains. Trading data showed elevated volume in Nvidia, Microsoft and Broadcom shares during the selloff, coinciding with quarterly results that revealed slower-than-expected AI infrastructure monetization. This marks a measurable shift from earlier 2024 rallies that treated AI capital expenditure as immediate earnings growth.

Market structure data indicate the Nasdaq-100 maintains over 50 percent technology weighting, amplifying sensitivity to any single sector revision. Federal Reserve balance sheet runoff and persistent policy rates have raised discount rates on long-duration growth assets, a factor visible in forward P/E compression for the same AI-exposed constituents. Earlier corrections in April and July followed similar patterns of rapid multiple contraction rather than broad economic deterioration.

Primary earnings transcripts and 10-Q filings from leading AI suppliers show capex guidance unchanged while revenue conversion timelines extended. This divergence between spending commitments and near-term returns creates the current pricing pressure. Institutional positioning records indicate hedge funds reduced net long exposure in the index by approximately 15 percent between August and October.

Next data points include October CPI release and Q3 GDP revisions due before month-end; sustained inflation above target would extend higher-for-longer rate assumptions and test support levels near 18,000 on the index.