Alphabet Loses Nearly $500 Billion in a Day: Why Google's Stock Had Its Worst Day Ever

Updated October 30, 2026

Alphabet, Google's parent company, lost roughly $500 billion in market value on Thursday, October 29, after its shares fell about 12.6% following a third-quarter earnings report. That is the worst one-day drop in the stock's history. Note what "lost" means here: the company's market value fell, but it did not spend or lose $500 billion in cash.

How big was the drop?

• Alphabet's shares fell 12.6% at the close (some outlets round it to nearly 13%), its worst single day since going public in 2004. The previous record was 11.63% in March 2020.
• The roughly $500 billion wipeout is the second-largest one-day market value loss in US history, behind Nvidia's $589 billion drop in January 2025.
• Alphabet's own previous record loss was about $275 billion in July.
• After the fall, Alphabet was worth about $3.47 trillion, still the fourth-largest US company.
• The Nasdaq Composite closed down 1.38% and the S&P 500 fell about 0.3%.

What the earnings showed

Alphabet reported its results on Wednesday evening, October 28. Revenue was $127.6 billion, up 25% from a year earlier, and operating income rose 30% to $40.6 billion. But the numbers landed below what Wall Street wanted in a few places:

• Revenue: analysts expected about $128.2 billion.
• Google Services: it brought in $96.3 billion against expectations of $98.5 billion.
• Search growth: Search revenue rose 12% to $63.4 billion, slowing from 17% in the second quarter and 19% in the first.
• Free cash flow: it was negative $9.07 billion, far worse than the $2.7 billion shortfall analysts expected.

The real worry: AI spending

Alphabet spent about $51.4 billion on capital expenditures in the quarter, mostly on data centers and computing for AI. That exceeded its $42.3 billion in operating cash flow. The company kept its 2026 capex guidance at $195 billion to $205 billion and signaled spending would grow significantly next year. To fund it, it raised about $12.4 billion through stock and $28.7 billion through debt in the quarter.

Investors have tolerated Big Tech's AI spending because core businesses kept producing profits. A slowdown in Search growth makes that cushion look thinner. Commentators said the drop reflects growing anxiety over how long it will take for AI investments to pay off.

Not all bad news

Cloud was a bright spot, with reported growth of about 103%. Part of the profit decline was also linked to an unrealized investment loss tied to SpaceX, not to a weakening of Alphabet's core operations.

What to watch next

1. Whether Search growth keeps slowing or stabilizes.
2. How Alphabet's free cash flow looks as capex rises.
3. Whether other AI spenders face similar pressure when they report.

This post is for information only and is not financial advice. Stock prices can change quickly. Check live data and official filings before making decisions.