📰 Key Takeaways

Big Tech’s AI infrastructure spending is making investors nervous. Alphabet, Amazon, Meta, and Microsoft reported over the past two weeks that their combined capex this year tops $740 billion, which Wall Street reads as spending on AI infrastructure like data centers and chips. Early in the AI boom, the market mostly rewarded big spending like this, but in Q4 the focus has shifted to negative free cash flow, rising debt, and whether these investments will pay off. On Friday the Nasdaq fell 2.9%, Nvidia dropped 4%, Broadcom fell more than 5%, and Qualcomm dropped 11%. Alphabet plunged 12% on Thursday, its biggest one-day drop ever, wiping out $500 billion in market value, and fell again on Friday.

Alphabet’s Q3 free cash flow was negative $9.1 billion, the second negative quarter in a row. Quarterly capex rose to $51.4 billion, it expects to spend up to $205 billion this year, and spending will keep rising in 2027. Meanwhile, AI Mode, built into Search, has become hugely popular and is eating into the core search ads business, which makes up about half of revenue. That business’s growth slowed to 12%, the lowest in five quarters. Amazon’s free cash flow over the past 12 months was negative $42.4 billion, versus positive $14.8 billion a year earlier, and it expects $220 billion in capex this year. Even though AWS revenue grew 39%, the stock still fell 7% after earnings. Meta’s Q3 free cash flow was negative $2.1 billion, and its capex guidance for the year is up to $145 billion. Its newly launched free personal AI agent, Muse, is expensive to run, and even with ad revenue up 26%, the stock fell 10% last week. Microsoft is the only exception, with positive free cash flow of $18.6 billion last quarter. See the original article for more details.

💬 JudyAI Lab Take

Alphabet dropped 12% in a single day, wiping out $500 billion in market value, its biggest one-day drop ever. Behind it is a shift in how the market judges these companies: the Big Four tech giants are spending over $740 billion in capex this year, and as we enter Q4, investors no longer reward the cash burn. They’re watching free cash flow and returns.

This story shows AI infrastructure entering the “show me the books” phase. Alphabet’s Q3 free cash flow was negative $9.1 billion, with quarterly capex rising to $51.4 billion. Amazon’s trailing 12-month free cash flow was negative $42.4 billion, and even with AWS revenue up 39%, the stock still fell 7% after earnings. Meta’s free personal AI agent, Muse, is expensive to run, and 26% ad revenue growth couldn’t stop a 10% drop. Alphabet’s AI Mode is hugely popular, but it’s also eating into search ads, which make up about half of revenue, and growth has slowed to 12%. For AI builders, this means a more popular product doesn’t necessarily make more money: if usage growth comes with compute costs that scale right along with it, margins get squeezed. Microsoft is the one exception, with positive free cash flow of $18.6 billion.

Next time you plan an AI feature, estimate the compute cost per user per request first, then decide whether to make it free.

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