Dumb money triumphant

Acadian

Owen Lamont

Article

6 Pages

Owen Lamont examines the recent stretch where retail-heavy portfolios outpaced the broad market while most-shorted stocks rallied. The pattern mirrors classic early bubble dynamics in which initial retail gains coincide with mounting pain for short sellers and rising risk of broader overvaluation.

Date Published: October 2025

As of October, 2025.

Key Takeaways

Retail outperformance: Portfolios reflecting popular retail holdings returned more than double the total market over the past year.
Short squeeze pressure: The basket of most-shorted stocks rose sharply, indicating losses for short sellers as speculative interest built.
Bubble echo: Similar retail leadership in twenty twenty one preceded a market decline, with retail favorites falling the hardest.
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