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AI Speculative Mania - Explained

A beginner-friendly explanation of AI Speculative Mania in value investing.

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AI Speculative Mania Explained

The hypothesis that the 2020s AI investment cycle represents the largest speculative bubble in history, with hyperscalers committing over 100% of cash flow to AI infrastructure

What It Means for Investors

The Thesis

Terry Smith argued at the 2026 Fundsmith AGM that AI represents the largest speculative craze in history, surpassing even the Dutch East India Company, Mississippi Scheme, South Sea Bubble, and dot-com bubble.

The Data

Bubble Estimated Value
Top 5 AI Hyperscalers + Top 5 Semiconductors $20 trillion
NASDAQ at dot-com peak $12 trillion
Dutch East India Company (inflation-adjusted) $8 trillion
Mississippi Scheme $6.5 trillion
South Sea Bubble $4.3 trillion

Smith: "The short answer to the first part of the question would seem to be yes. It is the biggest."

Key Takeaway

The hypothesis that the 2020s AI investment cycle represents the largest speculative bubble in history, with hyperscalers committing over 100% of cash flow to AI infrastructure

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