The Importance of Challenging Your Own Beliefs

Episode Summary

Executive Summary: The episode centers on confirmation bias during a historic market and public-health shock. Jack and Justin discuss how investors, under stress, seek out information that reinforces existing views, and why it’s critical to examine opposing arguments. They apply this to pandemic shutdowns, valuation and market declines, and small-cap value investing.

Main Topics: Confirmation bias in investing (Priority: 5/5): The hosts define confirmation bias as the tendency to seek, interpret, and remember information that supports existing beliefs, especially during stressful, highly polarized periods. Understanding the other side of the argument (Priority: 5/5): They stress that investors should deliberately engage with views that challenge their own, because doing so can improve judgment when uncertainty is high. Pandemic shutdown trade-offs (Priority: 5/5): The discussion weighs the public-health case for social distancing against the economic, psychological, and human costs of prolonged isolation. Market panic and valuation (Priority: 4/5): They debate whether the sharp market decline represents a buying opportunity or whether this crisis is different because valuations were not deeply depressed beforehand and earnings are highly uncertain. Small-cap value as a potential opportunity (Priority: 4/5): Jack argues that small-cap value looks historically cheap relative to past panics, but also explores the risk that coronavirus-related stress may permanently impair many companies. Practical methods to counter bias (Priority: 3/5): They suggest tactics like debating the opposite case and writing down counterarguments, while acknowledging implementation is difficult when beliefs are tied to identity and reputation.

Key Arguments: Investors naturally reinforce prior views by reading, listening to, and following sources that agree with them; this becomes more dangerous in periods of fear and uncertainty. During the pandemic, it is especially important to understand the trade-offs of prolonged social distancing, since the costs include not only economic pain but also mental-health and mortality consequences. Historically, market panics have often been strong long-term buying opportunities for investors with a five-plus-year horizon. This crisis may differ from prior panics because the market was expensive going in, earnings are unknowable, and the economy has been shut down in a way that has few direct historical parallels. Small-cap value appears attractive on both absolute and relative valuation bases, but the same shock could also produce widespread bankruptcies and structural damage. Counteracting confirmation bias is easier as an intellectual exercise than as an actual portfolio decision; changing a long-held public investing stance is psychologically and reputationally hard.

Data Points: Dow decline from February high: about 35% peak-to-trough - Mentioned as the scale of the market drop leading into the episode. Market decline at discussion point: roughly 20%+ off the highs - Used to describe the depth of the panic and why it may or may not be a buying opportunity. Time horizon for positive panic buying outcomes: 5+ years - The hosts say investors with this horizon have historically done very well buying during panics. Small-cap value absolute valuation: close to 2008 levels - Presented as evidence that small-cap value may be historically cheap on an absolute basis. Small-cap value relative valuation: close to 2000 levels - Used to argue small-cap value is cheap versus large-cap growth. Historical comparison sample size: roughly a dozen to 20 examples - Estimate of prior crises/panics available for historical base-rate analysis.

Pivotal Quotes: "what confirmation bias is, is when I have an opinion, I want to do everything... to support that opinion" — Jack: Defines confirmation bias and how it affects the information investors seek. "I may have a strong opinion that this social distancing may have to go on for a really long time, but there is a price we're paying" — Jack: Explains the need to recognize both the public-health rationale and the social/economic costs. "the hardest thing to do is to actually say, all right, you know, I've been this guy... I'm going to flip now" — Jack: Describes the difficulty of changing a public investing view when new facts emerge.

Implications: Listeners should actively seek disconfirming evidence, especially in crises, because stress makes bias worse. The episode also warns that past crisis playbooks may not fully apply to COVID-era shutdowns, so investors should pair historical base rates with humility.