A sharp tech sell-off that began earlier in the month and accelerated with disappointing corporate earnings has driven US markets down by hundreds of billions of dollars. According to reporting from The Guardian, the cumulative decline has knocked nearly $1 trillion in value off the tech-heavy Nasdaq exchange in a single week and erased approximately $2 trillion over the course of a month.
The market downturn reflects mounting investor anxiety regarding whether the immense capital being poured into artificial intelligence can generate adequate returns quickly enough. Hyperscalers including Meta Platforms, Alphabet, and Amazon have continued raising spending forecasts as they race to expand AI infrastructure.
Impact of the Tech Sell-Off on Major Indices
The broader S&P 500 index, which tracks 500 of the most valuable companies in the US, fell by more than 1% on Friday, shedding hundreds of billions in market value and threatening to erase its monthly gains despite hitting an all-time high earlier in October. The Nasdaq composite suffered a steeper drop of more than 3%, while the Dow Jones Industrial Average experienced a comparatively smaller decline.
Individual corporate reports heavily influenced the downturn:
- Alphabet: Shares dropped more than 12%, wiping $500 billion from its market capitalization in its worst day on record, after disclosing increased cash burn during the summer driven by heavy AI investments.
- Intel: Shares tumbled nearly 30%—flirting with the company’s worst day since 1974—after issuing a final-quarter profit forecast that fell short of analyst expectations, despite reporting a stronger-than-expected recent quarterly profit.
- Amazon: Stock fell 1.8% following weaker summer profits and higher-than-anticipated spending figures.
- Nvidia: A 3.1% decline for the chipmaker, previously valued at around $5 trillion, served as one of the heaviest forces pulling down the S&P 500.
Investor Scrutiny Over Artificial Intelligence Spending
The current market turbulence highlights a growing debate over whether hundreds of billions of dollars in AI infrastructure investments will produce sufficient profit and productivity gains. Additionally, computer chip companies and datacenter suppliers have faced pressure amid concerns that high interest rates might slow future infrastructure build-outs.
Despite these heavy technology losses, the rest of Wall Street experienced a mixed trading session, with the S&P 500 remaining roughly evenly split between gainers and losers. Broader market expectations remain high for corporate profitability, even as consumers worldwide navigate high inflation and fuel prices.
Source: Tech sell-off drives US markets down by nearly $1tn after subpar earnings reports (source-feed timestamp 2026-10-30T18:27:51+00:00). AI-assisted report based on the cited linked article and its RSS feed; details were not independently verified.
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