U.S. stocks fell sharply on Friday, October 30, as a worsening technology sell-off raised fresh doubts about the enormous sums companies are spending on artificial intelligence. The Nasdaq Composite suffered its biggest daily decline since June, while disappointing earnings forecasts from Intel and other technology companies shook investor confidence.
The S&P 500 fell 1.82%, closing at 7,580.07 for its worst trading session since June. The technology-heavy Nasdaq dropped 2.86% to 25,437.00, while the Dow Jones Industrial Average lost 572.25 points, or 1.09%, to finish at 51,770.31.
The losses marked a difficult end to October for investors who had benefited from rising technology shares earlier in the year. Companies associated with artificial intelligence, particularly chipmakers and major cloud-computing providers, faced some of the strongest selling pressure.
Intel Shares Plunge After Disappointing Forecast
Intel suffered one of the most dramatic declines, losing 28.6% of its market value in a single session. It was the semiconductor company's worst trading day since 1974, despite reporting third-quarter earnings that exceeded analysts' expectations.
The problem was Intel's outlook for the final three months of 2026. The company forecast revenue below Wall Street estimates and warned that pressure on the personal computer market was continuing.
Intel projected fourth-quarter revenue of approximately $15 billion to $16 billion, disappointing analysts who had expected stronger sales. Its forecast suggested that difficulties in the traditional computer business could continue even as demand for artificial intelligence hardware expands.
The semiconductor industry is experiencing an unusual divide. Companies supplying advanced processors for artificial intelligence systems have benefited from massive spending on data centers, while other businesses face rising costs and weaker consumer demand.
Higher prices for memory chips have become another concern. Demand from artificial intelligence infrastructure is placing pressure on supplies, making components more expensive for computer manufacturers and potentially discouraging consumers from purchasing new devices.
The weakness spread beyond Intel. Advanced Micro Devices shares fell 10.9%, while Nvidia declined 4.2%. The broader semiconductor index lost approximately 7.2%, reflecting widespread pressure across chipmakers.
Artificial Intelligence Spending Faces Greater Scrutiny
The technology sell-off reflects a growing concern among investors about the financial returns from artificial intelligence. Companies including Microsoft, Amazon, Alphabet and Meta have committed enormous resources to developing AI systems and expanding the infrastructure needed to operate them.
Those investments include specialized processors, electricity, cooling systems, networking equipment and new data centers. Much of the spending must occur before companies can determine how much revenue the infrastructure will eventually generate.
Reuters reported that the four technology giants accounted for more than one-third of capital spending by current S&P 500 companies over the preceding 12 months, according to research from Capital Economics.
Investors increasingly want evidence that the spending will translate into substantial profits. Strong demand for AI services has supported optimistic growth forecasts, but the cost of developing and operating those systems is also increasing.
Amazon's latest earnings report added to the uncertainty. Its results raised questions about profitability and the financial demands of expanding artificial intelligence capabilities.
Alphabet also came under pressure following its earnings announcement. Concerns about its core advertising business have added to questions about whether artificial intelligence could change the economics of internet search.
The issue is not simply whether artificial intelligence will become more widely used. Investors are questioning whether the companies building the technology can earn enough money to justify their spending and the high stock valuations attached to future growth.
Nasdaq Records Its Worst Month Since March 2025
Friday's decline extended losses that had already developed during October. The Nasdaq finished the month down approximately 5.2%, its weakest monthly performance since March 2025.
The S&P 500 also ended October lower, declining approximately 1.2% for the month. The Dow performed better, finishing the month with a gain of roughly 1.5%.
Technology companies had helped push major indexes to record levels earlier in October. The subsequent declines showed how quickly investor expectations could change when earnings reports challenged assumptions about future profitability.
The Nasdaq was approximately 7.8% below its October 6 record by Friday's close, according to Reuters. That retreat followed months of enthusiasm surrounding artificial intelligence and the companies expected to benefit from its adoption.
Other technology-related businesses also suffered significant losses. Sandisk dropped approximately 13%, while Reddit shares fell sharply amid concerns about its business outlook and changing internet traffic patterns.
The selling was not limited to companies directly involved in artificial intelligence. Investors also reduced exposure to other businesses considered vulnerable to slower growth, high valuations or changes in interest rates.
Earnings Remain Strong Despite Market Weakness
The broader earnings picture was not entirely negative. Many large American companies continued to report profits above Wall Street expectations, showing that the market decline did not reflect uniformly weak corporate performance.
According to Reuters, approximately 82% of the 299 S&P 500 companies that had reported third-quarter results exceeded analysts' earnings estimates. Analysts were also forecasting substantial earnings growth for the quarter.
Some energy companies provided an important contrast to the technology sector. Exxon Mobil and Chevron reported stronger-than-expected results, benefiting from conditions in the energy market.
Oil prices rose Friday, adding another concern for investors already watching inflation and economic growth. Higher energy costs can increase operating expenses for businesses and place additional pressure on household budgets.
Treasury yields declined as investors moved toward assets generally viewed as safer during periods of stock market volatility. Falling yields can reflect increased demand for government bonds as investors reassess risks elsewhere in financial markets.
Despite October's losses, the major U.S. stock indexes remained positive for 2026. The S&P 500 was up approximately 10.7% for the year, while the Nasdaq had gained 9.4% and the Dow had risen 7.7%.
Those gains show that Friday's sell-off was a sharp setback rather than a complete reversal of the year's market advance. However, the declines have increased pressure on technology companies to demonstrate that their investments can produce sustainable earnings.
Investors will enter November watching upcoming corporate results, economic indicators and changes in technology spending forecasts. A central question will be whether artificial intelligence revenue can grow quickly enough to support the extraordinary cost of expanding the systems behind it.