Nudge Nudge

Is the stock market just vibes?

Oct 19, 2026 · 25m

Summary

Host Phil Agnew interviews finance professor Alex Edmonds about his book *The Madness of Markets*, which explores how human emotion drives irrational stock decisions. They discuss how investors overreact to superficial trends like AI rebranding and football results, while underreacting to fundamental value drivers like employee satisfaction. Edmonds explains how these behavioral biases create predictable market inefficiencies that savvy investors can exploit through contrarian strategies.

Topics discussed

Intro: Market vibes and HubSpot sponsor Guest introduction: Alex Edmonds The concept of market overreaction Kahneman and Tversky anchoring study Allbirds rebrand and AI hype Historical rebranding bubbles: Blockchain and Dot-com Football results and stock market performance Why professionals cannot shake off emotions Recent examples: England defeat and market drop Methodology: Measuring national mood Music sentiment as a mood barometer Findings: Music mood and investment risk Takeaways: Awareness and contrarian investing Contrarian strategy: Buying losers, selling winners Global evidence and episode summary Sponsor break: The Ross Simmons Show Exploiting underreaction: Employee satisfaction Research: Happy employees and stock returns Why the market underreacts to culture Customer satisfaction and brand value metrics Conclusion and newsletter recommendations
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