The Folly of Certainty

Episode Summary

Executive Summary: Howard Marks argues that certainty is misplaced in politics, macroeconomics, and markets because outcomes are shaped by randomness, sentiment, and unknowable variables. Using Biden, the Fed, and market calls as examples, he shows how confident forecasts often fail and why intellectual humility—saying “I’m not sure”—is a better guide for investors and observers.

Main Topics: The folly of certainty (Priority: 5/5): Marks frames the memo around how people express absolute confidence in uncertain domains, especially politics and forecasting, and why that confidence is usually unjustified. Political forecasting and Biden's candidacy (Priority: 5/5): He uses recent claims about Biden's re-election prospects, the 2016 Trump surprise, and the post-debate election debate to show how confidently held political predictions can be overturned. Macroeconomic forecasting and the Fed (Priority: 5/5): Marks reviews the Fed’s 'transitory' inflation view, the rapid hiking cycle that followed, and repeated miscalls on recession and rate cuts to illustrate forecasting failure in macroeconomics. Market behavior vs. fundamentals (Priority: 5/5): He argues markets are harder to predict than economies or companies because investor psychology and emotion create volatility far beyond underlying fundamentals. Intellectual humility as an investor virtue (Priority: 4/5): Marks revisits his earlier memos to argue that admitting uncertainty leads to better decision-making, caution, and fewer catastrophic mistakes. Why experts are often wrong (Priority: 4/5): He cites Galbraith and Twain to explain that intelligence, credentials, and success do not guarantee correct predictions, and may even encourage overconfidence.

Key Arguments: No one can reliably forecast the future in politics, macroeconomics, or markets because many variables and random shocks are unknowable. Past examples show that widely shared certainty can be spectacularly wrong: Clinton was expected to win in 2016, yet Trump won and stocks rose sharply. The Fed’s inflation and rate-cut forecasts highlight how quickly consensus can be overturned by events and how markets may react in ways detached from the original forecast. Markets are more volatile and less predictable than GDP or corporate profits because investor psychology and emotions amplify swings. Many market and political commentators are intelligent and well-informed, but intelligence alone does not produce accurate forecasts. Intellectual humility—acknowledging uncertainty and the possibility of being wrong—reduces the risk of bad decisions and blowups. Even when a prediction turns out to be right, it may have been right for the wrong reason or merely because the unexpected did not occur. Certainty in uncertain fields is dangerous; doubt is a safer and more rational posture for investors.

Data Points: Biden debate date: June 27, 2024 - Referenced as the debate before which Jen O’Malley Dillon said Biden would win. New York Times article date: Tuesday, July 9 - Source that inspired the memo. 2016 stock market reaction after Trump victory: More than 30% over the next 14 months - Marks cites this to show markets did not collapse as many predicted. Fed rate-hike cycle: One of the fastest in history - Describes the tightening that followed the Fed’s 2021 transitory inflation view. Expected recession after hikes: No recession materialized - Contrary to the near-consensus in mid-2022. S&P 500 gain: Roughly 50% - What investors may have missed if they stayed out of the market waiting for rate cuts. 40-year standard deviation of annual percentage changes - GDP: 1.8% - Used to compare GDP volatility with profits and stock prices. 40-year standard deviation of annual percentage changes - corporate profits: 9.4% - Shows profits are more volatile than GDP but less than stock prices. 40-year standard deviation of annual percentage changes - S&P 500 price: 13.1% - Illustrates that stock prices are the most volatile of the three. Wimbledon women’s title odds for Barbora Krejčíková: 125-1 - Example of strong pre-tournament certainty that she would not win. Fed rate cuts priced by optimists in Dec. 2023: 6 cuts expected vs. 3 in Fed dot plot - Shows market optimism exceeded the Fed’s own expectations.

Pivotal Quotes: "There are two kinds of forecasters, those who don't know, and those who don't know they don't know." — John Kenneth Galbraith: Marks uses this to argue that many confident forecasts rest on hidden ignorance. "It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so." — Attributed to Mark Twain: Used to reinforce the danger of false certainty. "Doubt is not a pleasant condition, but certainty is absurd." — Voltaire: Marks cites this as a summary of his view on uncertainty in politics, economics, and investing.

Implications: Listeners should treat confident forecasts skeptically, especially in politics and markets. Better decisions come from humility, caution, and preparation for multiple outcomes rather than from acting as if the future is knowable.