Alphabet Stock Heads for Worst Day Since 2004 IPO as AI Spending Turns Cash Flow Negative

Alphabet stock was headed for its worst day since Google went public in 2004 on Thursday, Oct. 29, 2026, after the company’s third-quarter report showed free cash flow swinging deeper into the red as it pours money into artificial intelligence. Shares fell about 12% to 13% in morning trading and were down as much as 15.8% at one point, according to NBC News, wiping out more than $500 billion in market value in a single session.

The sell-off is striking because the quarter itself was large by almost any measure. Alphabet reported record revenue of $127.6 billion, up 25% from a year earlier, and its Google Cloud business more than doubled. The problem for investors was what it cost to get there, and what happened in search, Google’s core profit engine.

What Alphabet reported for the third quarter

According to Alphabet’s earnings release filed with the Securities and Exchange Commission on Oct. 28, revenue for the quarter ended Sept. 30 was $127.58 billion, compared with $102.35 billion a year earlier. Google Cloud revenue rose 103% to $30.71 billion, and the unit’s operating income climbed to $11.12 billion from $3.59 billion. Search and other revenue grew 12% to $63.35 billion, and YouTube advertising brought in $11.21 billion.

Operating income was $40.58 billion, an operating margin of about 31.8%. But net income was weighed down by an $8.22 billion loss in “other income,” driven mainly by losses on equity stakes, including its investments in AI labs. Diluted earnings per share came to $2.12, down from $2.87 a year earlier.

Chief executive Sundar Pichai pointed to the company’s scale in his earnings statement, saying Alphabet had reached a “half-trillion dollar revenue run rate.” The company said its Gemini app has passed 1 billion users and that it is now processing 32 billion tokens per minute across its AI surfaces. Alphabet kept its full-year capital spending guidance at $195 billion to $205 billion.

Why investors sold: search and cash flow

Two numbers drove the reaction. First, search revenue came in short of Wall Street estimates. Yahoo Finance put the consensus at roughly $65 billion, against the $63.35 billion Alphabet reported. On the earnings call, senior vice president Philipp Schindler said lower monetization in Google’s own AI Mode search feature, which shows fewer ads, was part of the reason, according to CNBC and NBC News. He added that ad experiments in the feature have “shown promising results.”

Second, free cash flow was negative $9.07 billion. Operating cash flow was $42.29 billion, but purchases of property and equipment, mostly servers and data centers, reached $51.36 billion. Analysts had expected negative free cash flow of about $2.2 billion to $2.7 billion, according to FactSet data cited by Axios and estimates cited by CNBC.

“The bears will argue this is the first quarter that AI is starting to seriously hurt their search business,” Pivotal Research CEO Jeffrey Wlodarczak said, as quoted by Yahoo Finance. CFRA’s Angelo Zino told Yahoo Finance the pullback “probably represents a buying opportunity.” JPMorgan analysts wrote that the “magnitude” of the search slowdown was “steeper than expected,” NBC News reported.

The data: Alphabet’s cash flow trend

The quarterly pattern explains why the market reacted so sharply. By The Boston Report’s calculations from Alphabet’s filings, free cash flow has fallen in each of the last four quarters, from $24.6 billion in the fourth quarter of 2025 to $10.1 billion in the first quarter of 2026, then to negative $5.9 billion and now negative $9.1 billion. Trailing 12-month free cash flow is about $19.7 billion, a fraction of the company’s annual net income.

To fund the build-out, Alphabet has been raising money in the markets. Its filing shows it issued about $28.7 billion in notes during the quarter and raised about $12.4 billion through “at-the-market” share sales. NBC News also reported that Alphabet has disclosed more than $1 trillion in multiyear commitments for infrastructure, energy and leases.

How Microsoft’s quarter compared

Microsoft reported the same evening, and its numbers offered a contrast. For its fiscal first quarter, also ended Sept. 30, revenue rose 19% to $92.28 billion and operating income rose 21% to $45.92 billion. Net income was $36.63 billion, or $4.92 a share. Azure revenue grew about 48%, and commercial remaining performance obligation, a measure of contracted future revenue, rose 73% to $677 billion.

Microsoft generated $58.0 billion in operating cash flow and spent $39.37 billion on additions to property and equipment, per its release. Including finance leases, CNBC put Microsoft’s capital spending at $45.2 billion, below the roughly $50.7 billion analysts had expected, and its free cash flow at $18.63 billion. In other words, Microsoft spent less than expected while still producing cash; Alphabet spent more than its operating cash flow.

Ben Barringer of Quilter Cheviot told CNBC that Microsoft handled its results in a “measured way” with “fewer surprises,” while calling Alphabet’s a “fairly messy set of results and a poorly handled earnings call.” Microsoft shares rose after hours Wednesday but were down about 2% by mid-morning Thursday, NBC News reported.

Market impact and what comes next

At its low, Alphabet had lost about $524 billion in market value, the second-largest one-day loss for a U.S.-listed company after Nvidia’s drop in January 2025, Yahoo Finance reported. The slide pulled the Nasdaq Composite down about 1.6% by mid-morning, according to NBC News, and chip stocks and Caterpillar, a supplier of equipment used to build data centers, also fell.

Amazon reports after the close Thursday, the last of the three largest cloud providers this week. Its Amazon Web Services growth and capital spending will be the next test of whether investors see Alphabet’s quarter as a Google-specific search problem or a broader sign that the AI build-out is consuming cash faster than it returns it. For background on the AI spending race, see our coverage of Anthropic’s IPO filing and OpenAI models arriving on Google Cloud, plus our Oct. 27 business report on the chip rally.

Sources

• Google: Alphabet Q3 2026 earnings message from the CEO
• CNBC: Alphabet stock drops 12% while Microsoft rises after earnings
• NBC News: Google’s stock price plunges, erasing $500 billion in value
• Yahoo Finance: Alphabet heads for a $500 billion drop in market value