The stock market tumbled on June 23, 2026, as a tech selloff deepened over mounting concerns about artificial intelligence capital spending, with the Nasdaq Composite falling 1.9% in early trading and the S&P 500 sliding 1.3% while the Dow shed 0.4%.
The selloff began on June 22 when Alphabet stock plummeted 6%, marking its worst day in over a year, driven by investor anxiety over the company’s massive AI infrastructure buildout and talent departures to rivals. Alphabet guided 2026 capital expenditures to a range of $175 billion to $190 billion, while Amazon flagged about $200 billion in capex across the company, bringing combined hyperscaler capex to over $452 billion for the year.
The concern centers on whether companies can monetize their AI investments quickly enough to justify the spending. Alphabet’s Q1 2026 free cash flow fell 47 percent year-over-year to $10.12 billion, while Amazon’s trailing free cash flow collapsed 95 percent to $1.2 billion, according to Yahoo Finance. The divergence between record capital spending and declining cash generation has spooked investors worried that AI returns lag the buildout.
The tech rout that sank Alphabet and Amazon about 5 percent and 4 percent, respectively, on June 22 expanded on June 23 to engulf memory and chip stocks that had led the market higher in recent months. Sandisk, the best-performing stock in the S&P 500 this year, fell 13 percent, while Western Digital and Micron, the index’s second- and third-top performers, declined 9 percent and 12 percent, respectively, according to Investopedia. A memory stock selloff in Asian markets caused South Korea’s Kospi index, dominated by chip firms, to plummet 10 percent.
Alphabet Faces Dual Pressures
Alphabet stock absorbed additional pressure from reports that a key Google DeepMind scientist departed for OpenAI, feeding concerns about AI talent retention. Reddit sentiment on Alphabet shifted sharply from bullish readings near 72 earlier in the week to bearish at 32 by Monday, according to 24/7 Wall St., as investors weighed the company’s record capex guidance against its shrinking free cash flow.
This market reaction echoes a comparable episode in February 2026, when AI spending concerns sparked a broader tech selloff. Reuters reported in early February that Wall Street indices fell as AI worries slammed tech stocks, with investors worried about the sustainability of massive capital outlays. That earlier selloff, like the current one, centered on whether the AI monetization payoff would arrive in time to justify the infrastructure spending.
SpaceX stock fell more than 4 percent to trade at its lowest price ever on June 23, extending a three-day losing streak since the company’s blockbuster IPO earlier in June. Other mega-cap tech stocks were mixed, with Nvidia falling 3 percent and Tesla off 3 percent, while Microsoft rose 2 percent to pace the group.
Oil prices continued to decline as the U.S. and Iran negotiated a peace deal, with West Texas Intermediate futures down about 0.5 percent at $73.50 a barrel. Bitcoin traded at $62,000, down from highs above $65,000, while gold futures slumped more than 1.5 percent to $4,130 a troy ounce.
Sources
- Investopedia — provided real-time market data on June 23 index moves, individual stock declines, and Asian market impact
- Yahoo Finance — reported Alphabet’s 6% decline on June 22, combined hyperscaler capex totals, and free cash flow figures
- 24/7 Wall St. — detailed Alphabet and Amazon capex concerns, free cash flow declines, and Reddit sentiment shifts
- Reuters — documented the February 2026 AI spending selloff as a comparable precedent
