Greenspan Penned ‘Irrational Exuberance’ 30 Years Ago. It Aged Well.

2026-06-22 · Source: Artificial intelligence - Crunchbase News · Field: Finance & Economics — Capital Markets & Investment Management, Economic Analysis & Policy · Depth: Intermediate, short

Summary

Former Federal Reserve Chairman Alan Greenspan, who passed away at 100, is remembered for coining "irrational exuberance" in a 1996 speech. He used the phrase to describe the challenge of valuing assets in an economy increasingly dominated by rapidly changing software and services, where traditional pricing logic struggled. This insight predated the dot-com boom and bust of the late 1990s and early 2000s, which saw many internet companies like Webvan and Pets.com fail, while others like Google and Amazon grew to nearly \$8 trillion combined. Greenspan later introduced the "lottery ticket" analogy in 1999, comparing speculative stock purchases of internet companies to buying lottery tickets, where a few yield huge wins despite most failing. The article applies this analogy to the current "AI mania," noting high valuations for nascent companies like Anthropic (\$965 billion) and OpenAI (\$852 billion), but observes that today's major players are already valued as established winners, unlike the dot-com era's small "wanna-bes."

Key takeaway

For investors evaluating high-growth technology companies, Greenspan's "irrational exuberance" and "lottery ticket" analogies remain highly relevant. You should critically assess whether current AI valuations reflect genuine long-term potential or speculative frenzy. Distinguish between established, well-capitalized players like OpenAI and Anthropic, which are priced as future winners, versus smaller, unproven ventures. Your due diligence must account for the unique challenges of valuing fast-evolving tech, avoiding the pitfalls of past market bubbles.

Key insights

Valuing assets in fast-changing tech sectors like software and AI presents unique challenges due to "irrational exuberance" and "lottery ticket" dynamics.

Principles

• Asset valuation is complex for fast-evolving tech.
• Speculative markets often resemble lottery ticket purchases.
• Early-stage tech valuations can reflect future dominance.

In practice

• Compare current AI valuations to dot-com era bubbles.
• Analyze market sentiment for "irrational exuberance."
• Distinguish established tech giants from speculative startups.

Topics

• Alan Greenspan
• Irrational Exuberance
• Dot-com Bubble
• AI Mania
• Asset Valuation
• Speculative Markets

Best for: Investor, Executive, Entrepreneur

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Editorial summary, takeaway, and curation by AIssential. Original article published by Artificial intelligence - Crunchbase News.