Experts Worry Election-Betting Markets Are Skewed Ahead of Vote

  • Harris momentum rises but Trump still leads odds on most sites
  • Yet even supporters question predictive powers of these sites

Campaign signs for Kamala Harris and Donald Trump in Greensboro, North Carolina, on Nov. 3.

Photographer: Al Drago/Bloomberg
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Economists have long loved prediction markets. Even niche platforms such as the Iowa Electronic Markets and betting pools inside companies like Ford Motor Co. have been praised for their fortune-telling prowess.

And now, the online emporiums have entered the big leagues with the 2024 presidential election.