• The CBOE (CBOE:CBOE) Volatility Index (VIX) spiked as much as 48% intraday, the largest percentage jump since April 4, 2025, when Trump's sweeping tariff announcements triggered a market meltdown.
  • The surge comes as investors aggressively unwind popular stock market trades amid a sharp technology-led selloff, though the VIX remains below 25, still lower than levels during the early stages of the Iran war.
  • The technology selloff, driven by disappointing earnings and concerns over AI spending, has erased over $2 trillion from the Nasdaq 100 in October, but the latest VIX reading shows volatility has since subsided.

Fear Gauge Spikes Amid Tech Selloff

The CBOE Volatility Index (VIX), often referred to as Wall Street's fear gauge, jumped as much as 48% on Thursday, marking its largest percentage surge since April 4, 2025, when President Trump's sweeping tariff announcements sent shockwaves through global markets. The spike comes as investors aggressively unwind popular stock market trades amid a sharp technology-led selloff.

Despite the dramatic increase, the VIX remains below 25, still lower than levels reached during the early stages of the Iran war and well below its post-Liberation Day peaks. The index measures near-term expected S&P 500 volatility derived from options prices. As of November 5, 2026, at 10:31 a.m. on Cboe's delayed display, the VIX stood at 16.83, up 1.32%, following a previous close of 16.61—a far cry from the 48% surge reported earlier. The discrepancy highlights the fleeting nature of intraday volatility spikes and the importance of distinguishing between momentary fear and sustained market stress.

Technology Rout Weighs on Sentiment

The underlying technology selloff has been well documented. On October 30, the Nasdaq Composite fell 2.9%, its largest daily decline since June 5, after disappointing results from Amazon (NASDAQ:AMZN) and Intel (NASDAQ:INTC) intensified concerns about the cost and profitability of artificial-intelligence investments. Intel plummeted 28.6%, while Nvidia (NASDAQ:NVDA) and AMD (NASDAQ:AMD) dropped 4.2% and 10.9%, respectively.

Across October, the S&P 500 technology sector lost 6.8%, its worst month since March 2025. However, nine of the index's 11 sectors gained, leaving the broader S&P 500 down less than 1% for the month. What began as a rotation away from technology rather than indiscriminate selling across all equities has now morphed into a broader reassessment of risk.

Reuters (NASDAQ:TRI) reported on November 3 that more than $2 trillion had been erased from the Nasdaq 100 during October, alongside rising concerns about technology-company financing and the viability of some data-center projects. The selloff has been fueled by worries that heavy spending on AI infrastructure may not generate adequate returns quickly enough. Capital Economics economist John Higgins noted that investors were becoming more nervous as the major cloud companies' capital-spending boom became partly dependent on external financing.

AI Investment Faces Profitability Test

Investors are increasingly scrutinizing whether spending on chips, data centers, and AI services will justify the massive outlays. The concern has spread beyond share valuations to credit availability. Some data-center projects are already struggling to raise money, according to people familiar with the matter. The market's central question, as articulated by Wealthspire Advisors' Oliver Pursche, is whether AI will produce a positive return on investment—and how quickly. Broadcom (NASDAQ:AVGO) CEO Hock Tan's comparison of AI-sector investment to "casino gambling" underscored the skepticism.

Historical Parallels and Market Context

The tariff comparison refers to a distinct policy shock. Trump announced the "Liberation Day" tariffs on April 2, 2025; April 4 was a subsequent major market-reaction day, not the announcement date. On that day, the VIX rose 15.29 points to close at 45.31, its highest closing level since April 2020. U.S. stocks had lost more than 10% over two days, and the Nasdaq entered a bear market as tariff retaliation intensified. China's retaliation escalated fears of a global trade war, and Federal Reserve Chair Jerome Powell said the tariffs were larger than expected and would likely bring greater inflation and slower growth than previously anticipated.

The recent selloff has a different immediate catalyst—AI earnings, capital spending, and financing—but it is occurring against a backdrop of wars, elevated sovereign debt, and trade tensions. Reuters also identified higher oil prices and French government-bond stress as contributors to October's risk aversion. On October 13, reports of advances by China's memory-chip producer CXMT pressured U.S. semiconductor shares, particularly Micron (NASDAQ:MU), illustrating how competition and geopolitical exposure can reinforce valuation concerns.

Broader Economic Exposure

A prolonged retreat could weaken investment and household confidence. Reuters commentary identified the risk that an AI-led slump could deepen an economic slowdown, while explicitly noting that it was not yet clear whether the selloff would become something more serious. The pressure is not confined to Silicon Valley. Technology-stock declines in South Korea and China, along with wider market strains involving sovereign debt and currencies, have been reported. Moreover, technology and AI-related stocks represent more than 40% of the S&P 500, according to Reuters estimates, making the broader benchmark vulnerable even when other sectors perform reasonably well.

What's Next for Markets?

The critical question is whether investors keep reallocating from expensive technology shares into other sectors or begin selling equities more broadly. Miller Tabak strategist Matthew Maley warned that a more compelling decline in major indexes could shift investor behavior from sector rotation toward cash. That is a conditional risk assessment, not a confirmed forecast.

The latest Cboe reading shows that the headline's extreme percentage jump was not persisting at the same intensity by November 5. It does not, by itself, establish that technology-sector or financing concerns have been resolved. The most consequential issue is whether AI-related revenue and cash generation justify continued infrastructure investment. A sustained mismatch could affect technology valuations, financing conditions, and investment plans; stronger evidence of returns could ease the concern.

Related developments worth following include semiconductor competition, financing stress in technology-company debt, and uneven corporate results. Super Micro (NASDAQ:SMCI)'s revenue beat initially lifted its shares by more than 10% on October 21, before broader risk aversion eroded part of that gain—evidence that strong individual results can coexist with sector-wide pressure.

Correction: An earlier version of this article misstated the date of the VIX's 48% surge. The spike occurred on November 5, 2026, not November 4. The article has been updated to reflect the latest VIX reading and to clarify that the surge was an intraday move.