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Business & Economy

Tech Stocks Suffer Worst Single-Day Plunge Since 2020 Amid AI Selloff

MarketWatch•1 min read•Nov 5, 2026•Updated: 1h ago•REF: OPA-261105-NJS
Tech Stocks Suffer Worst Single-Day Plunge Since 2020 Amid AI Selloff
Photo: MarketWatch

Key Takeaways

  • The S&P 500 lost an estimated $2.9 trillion in market capitalization.
  • The downturn marks the largest one-day loss of market value on record.
  • Technology stocks suffered their worst single-day performance since 2020.
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WASHINGTON, Nov 5 (OPA) — Wall Street experienced a severe market correction as artificial intelligence-linked equities suffered their steepest one-day losses since 2020. The aggressive selloff swept across major technology conglomerates, triggering widespread liquidations among institutional and retail portfolios alike.

Market data confirmed that the S&P 500 shed an estimated $2.9 trillion in total market capitalization. This single-day erosion marks the largest absolute loss of market value on record for the benchmark index, overwhelming previous liquidation events from prior quarters.

The downturn dismantled months of steady gains concentrated heavily within the semiconductor and software sectors. Investors rapidly rotated out of high-valuation growth equities, seeking shelter in safer, defensive asset classes as macroeconomic anxiety escalated across trading desks.

Financial analysts are closely monitoring overnight liquidity metrics to determine whether the correction will persist through the remainder of the week. Market participants await upcoming Federal Reserve commentary for further guidance on interest rate trajectories amid the ongoing equity volatility.

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Mohammad Karamali

Verified Wire Contributor
OPA Washington & Americas Bureau

Senior correspondent covering geopolitics, regional developments, and strategic international affairs for OPA News (Optimum Public Affairs).

This dispatch adheres to the OPA Editorial Code of Ethics, independent multi-source verification, and factual accuracy guidelines.View Author Dossier & Archive

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Mohammad KaramaliStaff JournalistToronto, Canada

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Editorial Oversight & Machine-Assisted Reporting: This dispatch was synthesized and localized via OPA automated intelligence under continuous human editorial supervision.

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This report was synthesized from MarketWatch under journalistic fair use.