Weak guidance from Intel, Amazon's cash burn and Alphabet's slide pushed investors to question whether the AI buildout will pay off
The Nasdaq 100 and S&P 500 together lost nearly $3.3 trillion in market value as disappointing earnings and soft guidance set off a broad selloff in US stocks.
On October 30, 2026, the Nasdaq Composite fell 3.37% to close at 25,303.37. The S&P 500 slipped 2.08% to 7,559.85 the same day.
A rough week for the biggest names in tech
The Nasdaq 100, home to the largest non-financial companies on the exchange, was headed for its worst stretch since mid-June. Its losses exceeded 3% as fears about enormous AI-related capital spending deepened.
The nearly $3.3 trillion aggregate value loss spread across the month of October. The Nasdaq 100 alone was forecast to post a monthly wipeout of more than $2 trillion, driven largely by concern over AI outlays.
Semiconductor makers and hyperscalers, the giant cloud providers that rent computing power to everyone else, led the declines.
Intel took the hardest single hit. Its shares dropped approximately 29-30% after the chipmaker guided fourth-quarter revenue to $15-16 billion, below the roughly $17 billion the market expected.
Amazon gave investors a different kind of headache. The company reported negative free cash flow of $42.4 billion over the trailing 12 months, and it kept its 2026 capital expenditure guidance at around $220 billion.
Alphabet had already set the mood a day earlier. The Google parent fell more than 12%, erasing roughly $500 billion in market value amid worries about the growth of its search advertising business.
From growth story to profit question
Investor expectations are shifting away from revenue growth and toward a clearer timeline for profitability, and that shift is happening against a backdrop of rising borrowing costs.
This is also not the first time in 2026 that tech has wobbled this hard. In June, the market recorded a $1.3 trillion loss over just two days, which points to a pattern of recurring volatility in tech stocks rather than a one-off scare.
The Nasdaq 100 heading for its worst performance since that mid-June episode reinforces the point. Selloffs tied to AI spending are becoming a recurring feature of the calendar, not a rare event.
What this means for investors and the AI trade
Chipmakers like Intel live or die on guidance, so a weak forecast hits immediately. Hyperscalers like Amazon face a slower burn, where the risk is that spending keeps rising while the payoff stays out of reach.
Alphabet’s slide adds another wrinkle. Concern about search advertising suggests investors are not only questioning AI costs but also asking whether AI could disrupt the cash engines that pay for it in the first place.
The S&P 500’s 2.08% drop was smaller than the Nasdaq’s, but it still reflected how much of the broad index now rides on the same AI bet.
