Wall Street saw a massive selloff on November 5, 2026, with the Nasdaq 100 tumbling over 6%—its steepest decline since the 2020 pandemic crash. The $2.3 trillion wipeout was triggered by investor concerns that a political shift could bring stricter regulations on AI data centers. This has sparked a broad reassessment of the tech sector, particularly chipmakers and AI-infrastructure firms.
Wall Street suffered a historic day of selling on November 5, 2026, as investors aggressively pulled capital from technology and artificial intelligence stocks. The Nasdaq 100, which is heavily weighted toward these sectors, dropped over 6%, marking its sharpest one-day decline since the pandemic-era market crash in March 2020. The broader S&P 500 also retreated by 4.4%, leading to an estimated loss of $2.3 trillion in market value across US equities.
Election Fears Hit AI Stocks
The driving force behind the liquidation was a shift in political expectations. Investors reacted sharply to outcomes from recent midterm elections, fearing that a Democratic victory would lead to tighter regulatory oversight of the technology sector. The market is particularly sensitive to potential changes in data center infrastructure policy, including stricter environmental or zoning regulations that could slow down the rapid expansion of AI-related facilities. This uncertainty led to a massive repricing of assets that had previously rallied on the expectation of uninterrupted growth.
Semiconductor companies, often seen as the primary beneficiaries of the AI infrastructure boom, faced the heaviest selling pressure. The Philadelphia Semiconductor Index, a key tracker of chipmaker performance, plunged 12%. Nvidia, a major player in the space, saw its shares fall 9.26%, extending a decline that has seen the stock drop roughly 24% from its early October peak. The selling reflects a broader concern that the massive capital spending by major technology companies—often called hyperscalers—may face future headwinds if regulatory hurdles increase the cost or complexity of their projects.
Volatility and Investor Anxiety
The Cboe Volatility Index, often called the market’s fear gauge, surged to levels not observed since the early weeks of 2020. This spike indicates that institutional investors were not just selling, but also actively hedging against further downside. Market liquidity tightened as leveraged hedge funds began unwinding large positions, a process that can accelerate selling when asset prices fall rapidly.
Risks and Future Monitoring
For investors, the current environment is defined by uncertainty regarding the sustainability of the AI capex boom. The central risk is that if major technology companies pull back on their infrastructure spending due to regulatory pressure, chipmakers and data center providers will see their growth rates slow significantly. Furthermore, the reliance on high-multiple tech stocks for market gains has left indices vulnerable to broad corrections when sentiment shifts.
The next steps for the market will center on management commentary from major technology firms regarding their future capital spending plans. Investors will also look for clarification from policymakers on the specific scope of potential AI and data center regulations. The ability of the market to stabilize will depend heavily on whether this selloff represents a short-term panic driven by election news or a more sustained adjustment to changing regulatory and economic expectations.