“Despite bringing in 171 trillion won in revenue, shares plunge 10%” ... The real reason Google shareholders were stunned [Money Signal]

Suppose an ordinary office worker invested 30 million won in U.S. stocks, money painstakingly saved by setting aside part of each paycheck.
Believing in the stability of its business and the future of artificial intelligence (AI), they chose Google (Alphabet), the world’s largest search company. They were also firmly convinced that as long as earnings held up, the stock price would not let them down.
Then one morning, they wake up to earth-shattering news: Google’s stock has plunged 10% in after-hours trading. Ten percent of 30 million won is 3 million won. It was as if 3 million won in hard-earned cash—the amount they would have to save 500,000 won a month for six full months to accumulate—had vanished into thin air overnight.
The stock market is a place where even investors in blue-chip companies that pride themselves on being the world’s best can face this kind of brutal volatility overnight. But the most shocking thing about this latest market plunge is the very “reason” the stock fell: it wasn’t because Google failed to make money.
According to foreign media and the financial industry on the 29th, Google’s parent company Alphabet reported its third-quarter 2026 results on the 28th (local time). Revenue was $127.58 billion, up 25% from the same period last year. Converted into won, that amounts to about 171 trillion won—an astronomical sum. In just three months, it comfortably surpassed the annual revenue of most major South Korean companies.
But Wall Street’s screens were unforgiving. After rising 1.34% in regular trading, the stock plunged more than 10% at one point in after-hours trading immediately after the earnings announcement.
The market turned away because of “missing expectations” and “uncontrollable AI investment costs.” Wall Street had forecast third-quarter revenue of $128.22 billion, while the actual result came in about 0.5% ($640 million) below that. Net income ($26.17 billion) shrank about 25% from a year earlier. Earnings per share (EPS) also came in well below market expectations of $3.02, at $2.12. (EPS adjusted for mark-to-market losses on its stakes in SpaceX and Anthropic was $2.67, but that too fell short of expectations.)
Of course, Google’s AI business itself grew explosively. Third-quarter cloud revenue surged 103% year over year to $30.71 billion, and the segment generated $11.12 billion in operating profit. Its revenue had doubled in just one year—a remarkable feat.
Even so, the decisive reason the market dumped Google lies in another figure: “$51.36 billion (about 69 trillion won).” That was how much Alphabet spent on capital expenditures (CapEx) in a single quarter for infrastructure including AI data centers, servers and semiconductors. The amount surged a staggering 114% from last year.
Naturally, its coffers began to run dry. Alphabet’s third-quarter free cash flow (FCF) came in at negative $9.065 billion, a deficit equivalent to 12 trillion won. Free cash flow means the “real cash” a company actually has on hand after subtracting capital spending from the money it earns through operations. Even Google, one of the world’s most profitable companies, is suffering massive cash outflows for a second consecutive quarter as it joins the AI arms race.
Think of it as a household budget. A salary rises from 5 million won to 6.25 million won, but someone spends 8 million won on tutoring and equipment, supposedly to prepare for the future, and ends up overdrawn. The investment may not be wasteful, but the essential point—that there is less cash available to spend right now—is the same for a company as it is for a household.

That is the bill Wall Street has handed Google.
The fundamental question is: “We know you’re making money with AI, but exactly how much do you have to pour in to make that money, and how much cash ultimately goes to shareholders?”
Alphabet put its full-year capital spending forecast at up to $205 billion (about 275 trillion won) and signaled that it would sharply increase spending again next year (2027). Investors read this as a chilling warning that “the cash drought will continue for the time being.” By contrast, Microsoft (MS), which reported earnings the same day, demonstrated robust cash flow that exceeded market expectations despite its massive AI investments. Its shares rose more than 5% in after-hours trading, making for a stark contrast with Google.
Ultimately, Google’s 10% after-hours plunge is the opening signal that the rules of the stock market have changed.
A narrative that “AI demand is expanding” is no longer enough to clear Wall Street’s exacting bar. The process of separating winners from losers has begun, with investors coldly scrutinizing who is actually making profits, how much they are spending to generate those profits, and how much cash they ultimately have left.
[email protected] Jeon Sang-il Reporter