Something You Should Know Something You Should Know

When to Speak Up and When to Stay Quiet & Why Smart Investors Do Crazy Things

Oct 5, 2026 · 50m

Summary

Host Mike Carruthers discusses the science of speaking up with social psychologist Vanessa Bohns, who explains how to navigate the "mum effect" and when to offer feedback. The episode also features behavioral finance expert Alex Edmonds, who explores why markets overreact to news and how everyday investors can benefit from compounding and index funds. Additionally, the show shares quick facts about indoor spiders and the specific pumpkin varieties used for baking versus carving.

Topics discussed

Show intro and sponsor reads Why spiders appear in houses in the fall Introduction to the dilemma of speaking up Interview with Vanessa: The psychology of feedback Why we hesitate to correct others The lipstick study and the bystander effect When to give feedback: Utility vs. Ego Predicting outcomes: Goals and the 'If I were them' test Applying the perspective-taking intervention Sponsor segments: Vinted and Shopify Navigating compliments and 'benevolent honesty' The elevator story: Communicating care without fixing Compliments, warmth, and asking before giving feedback Sponsor segment: American Express Business Platinum Interview with Alex: The madness of markets Market bubbles, contrarian investing, and Julian Robertson The power of compounding and index funds Why individual stock picking often fails How emotions and sentiment drive market movements Momentum vs. Reversal and evaluating fund managers Fun fact: The origin of canned pumpkin
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