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NewsMaterial3 min readDisconfirmAI Editorial

Barry Ritholtz: Futures, Prediction Markets, and Polls All Missed the Mark in the 2026 United States Midterm Elections

Using the 2026 United States midterm elections as a case study, Barry Ritholtz documents severe deviations across stock index futures, Polymarket prediction markets, and opinion polls during the same event. He traces these failures to three shared human cognitive defects—tribalism, poor information diet, and inadequate self-assessment capabilities—arguing that this combination is fatal for capital allocation decisions.

2026-11-05 01:00 GMT+8

On November 4, 2026, Barry Ritholtz, founder of Ritholtz Wealth Management, published a short essay on the United States midterm elections. He recorded how three tools he previously used to track political trends all failed simultaneously that night: stock index futures had already sold off deeply by 6 p.m.; prediction markets such as Polymarket severely underestimated the win probability of Democratic candidates; and while opinion polls got the general direction roughly right, they exhibited significant magnitude errors, completely failing to predict the election of Democratic senators in Kansas and South Carolina, or the sharp reversal in Texas. By noon on November 4, the Dow Jones Industrial Average had rebounded approximately 3% from its previous day's low, while the S&P 500 and Nasdaq Composite each rose about 2%.

Ritholtz attributes these failures to three factors he considers inherent human cognitive defects: tribalism, a bad information diet, and the difficulty of accurately assessing one’s own abilities. He describes these three elements as fundamental obstacles when analyzing social events and politics, stating bluntly that when this combination is applied to capital allocation decisions, the consequences are fatal. He cites screenwriter William Goldman’s famous quote, "Nobody knows anything," to encapsulate this unknowability, but immediately admits that using this quote feels like cheating—it exploits cognitive limitations formed in an evolutionary environment to explain prediction failures in modern financial markets, limitations that most people either do not know about or do not care about.

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However, Ritholtz also explained why this particular election was especially difficult to predict. He noted that the President won in 2024 by broadening traditional Republican demographics, adding young males, less-educated groups, and Hispanic voters to the coalition, which made the Republican alliance vulnerable in a normal midterm cycle. He listed three specific policy factors—the aggressive immigration enforcement by Immigration and Customs Enforcement (ICE), a muscular foreign policy supporting multiple wars, and chaotic tariff policies—as catalysts for the coalition's disintegration. Exit polls showed that 43% of voters cast their ballots to oppose Trump, compared to only 16% who voted to support him; turnout models completely underestimated the mobilization intensity among voters leaning toward the Democratic Party.

For investors, the value of this short essay lies not in providing a new predictive model, but in exposing an operational issue through a concrete case: when futures, prediction markets, and opinion polls all point in the same direction, does this consistency truly represent triple independent verification? Ritholtz does not directly answer this question, nor does he offer an alternative solution. However, his approach of juxtaposing the failures of the three tools and then attributing them to the same set of human cognitive defects forces readers to re-examine the evidentiary logic behind relying on multi-signal cross-confirmation for political risk.

Whether Ritholtz’s core warning depends on the exceptional nature of this election is not clearly distinguished by him personally. He records both the historical pattern that all presidents lose Congressional seats in midterms (with only four exceptions) and emphasizes that the 2024 strategy of broadening the coalition made this midterm particularly fragile. If the 2026 prediction failures were primarily driven by this specific political context, then the applicability of these findings to general midterms must be discounted. But if what he truly intends to convey is that whenever futures pricing, prediction market odds, and opinion polls rely on human judgment, their correlation is much higher than it appears on the surface—then the scope of this warning extends far beyond a single election.

Ritholtz offers no advice on how investors should replace these tools. What he leaves behind is a set of specific facts (how each of the three tools erred), an attribution (shared human cognitive defects), and a candid admission of self-doubt (whether quoting Goldman constitutes cheating). For readers, this is more useful and more honest than a ready-made methodology.

Sources

  • ritholtz.comThe Big Picture↗
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