Finance
Finance4 Oct 20268 min read

AI Is a $730B Prisoners' Dilemma. Your Index Fund Owns Every Prisoner.

The four largest US hyperscalers will spend roughly $730 billion on AI infrastructure in 2026 — nearly double what they spent in 2025, and roughly all of their operating cash flow. Call it a bubble and you miss the mechanism: every one of them is acting rationally. That is the problem.

TQ
The Quant
⁦2026-W40⁩ edition
The story in numbers

How the AI buildout reached $730 billion

Big four capex, $B
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$90.0bn
$412.0bn
$730.0bn
202020252026
Step 1 of 7

1In 2020, Amazon, Microsoft, Google and Meta spent about $90 billion on capital expenditure between them.

2In 2025 the same four companies spent roughly $412 billion.

3In 2026 their own guidance sums to roughly $730 billion, eight times the 2020 level.

4Capex now absorbs roughly 100% of their operating cash flow, against about two-thirds in 2025.

5Inference alone cost OpenAI $8.4 billion in 2025: 64 cents of every dollar of its $13.1 billion revenue. Its projected 2026 loss is around $14 billion.

6The four spenders disagree on how long the hardware lasts. Amazon cut part of its fleet from six years to five; Meta extended most of its fleet to 5.5; Microsoft and Alphabet had already moved to six.

7Across fiscal 2025 to 2030 the four will spend roughly $5.3 trillion. If AI is a $1 trillion market and public companies capture 70%, revenue covers that in about seven and a half years. At $300 billion, past twenty-five.

In 2020, Amazon, Microsoft, Google, and Meta spent about $90 billion on capital expenditure between them. In 2025 they spent roughly $412 billion. In 2026, their own guidance sums to roughly $730 billion — Amazon at $220 billion, Alphabet at $200 billion, Microsoft at $175 billion, Meta at $137.5 billion; Morgan Stanley's tally, adding Oracle, comes to about $805 billion. The 2026 figure is nearly twice 2025's and eight times 2020's. It is also approximately 100 percent of the four companies' combined operating cash flow, against about two-thirds in 2025 — the first time the ratio has reached that level.

The last time an industry built infrastructure at this intensity was fiber. In the five years after the 1996 Telecommunications Act, US carriers poured more than $500 billion into fiber optic cable, switches, and wireless networks. Global telecom stocks lost more than $2 trillion of market value between 2000 and 2002. The fiber itself carried the next two decades of the internet. The infrastructure was real. The equity returns were not.

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