Why is Alphabet stock plunging today?

Alphabet stock is plunging 10.3% in pre-open trading today to reach $291.50, after the company’s Q3 2026 results — posted after Wednesday’s closing bell — delivered a broad earnings miss that rattled investors already on edge about the sustainability of its AI spending cycle.

Diluted EPS of $2.12 fell nearly 30% short of the roughly $3.02 analyst consensus, with net income tumbling 25% year-over-year to $26.17 billion, weighed down in part by an $8.2 billion unrealized loss on Alphabet’s equity stake in SpaceX following a decline in that company’s valuation during the quarter.

The free cash flow picture proved equally alarming to markets. Alphabet reported negative free cash flow of $9.07 billion for the quarter — a dramatic swing from positive $24.46 billion in the same period a year ago — driven by quarterly capital expenditure of $51.4 billion, more than double the prior-year level.

Management maintained its full-year 2026 capex guidance of $195 billion to $205 billion and signaled that spending would rise significantly again in 2027, a forward commitment that deepened investor anxiety over whether AI infrastructure outlays can generate commensurate returns.

Jefferies analyst Brent Thill observed that Google Cloud — which more than doubled revenue to $30.71 billion — was "the only business that beat," while "everything else missed."

The broader market offered little relief. U.S. stock futures declined overnight, with Alphabet’s miss reigniting sector-wide concerns about AI capital expenditure returns, dragging the Nasdaq lower by 1.1%.

The Federal Reserve held its benchmark rate steady at 3.75%–4.00% on Wednesday, but the yield curve steepened after the subsequent press conference, adding a macro headwind.

By contrast, Microsoft reported quarterly cloud results that beat estimates, a juxtaposition that further underscored Alphabet’s relative underperformance and raised questions about competitive positioning in the AI race.

Taken together, the combination of a near-30% EPS miss, a second consecutive quarter of negative free cash flow, decelerating core search advertising growth, and an open-ended commitment to rising AI capital spending created a perfect storm of negative sentiment.

With the stock now trading at $291.50 — well below its 52-week high of $408.61 — the pre-market selloff reflects a market demanding clearer evidence that Alphabet’s historic AI investment cycle will translate into durable profit growth.