Polymarket traders doubt there will be a recession. We asked prediction gurus if you should listen.

• Polymarket and Kalshi traders' perceived probability of a recession this year has plunged recently.
• Both prediction markets surged in popularity after users called Trump's election win in November.
• These tools have advantages as well as drawbacks, prediction gurus told BI.

Polymarket and Kalshi users called Donald Trump's election victory. Now, they're dialing down the threat of a US recession this year.

Polymarket, which shot to prominence after its users correctly predicted Trump would comfortably beat Kamala Harris even as polls suggested the race was a coin toss, put the chance of a prolonged economic downturn on Wednesday at 20%, down from 66% in April.

Kalshi put the probability at 19%, a sharp decline from 70% in early May.

Recession fears spiked when Trump announced tariffs in April. Wall Street braced for higher prices that could delay interest-rate cuts, stall growth, and cost jobs.

Yet inflation and unemployment haven't surged, partly because Trump has paused some tariffs to negotiate new deals. Investors have sent stocks to record highs in recent days.

Business Insider asked prediction gurus — an analyst, an investor, and two academics — how useful online betting platforms are as recession indicators. They said they're worth watching but have flaws — and calling an election is very different from calling a recession.

Polymarket and Kalshi rely on the wisdom of crowds

Polymarket and Kalshi derive probabilities from the prices of contracts traded by users. On the recession question, the "yes" contracts were trading for around $0.20 and the "no" contracts for around $0.80 on both platforms on Wednesday, indicating the probability bettors as a group were seeing.

One benefit of the platforms is that they tap into the wisdom of crowds. Koleman Strumpf, an economist at Wake Forest University who teaches a course in prediction markets, told BI that they use "the information of thousands of traders who collectively have a wide range of knowledge."

He said the tools are "not always perfect," but they "reflect what is currently known about the economy and so are likely the best available forecast."

Live tracking of bets means these tools "offer a real-time snapshot of investor sentiment and expectations," James Broughel, an economist at the Competitive Enterprise Institute, told BI. In contrast, traditional economic data are often released with a lag of weeks or months.

Polymarket and its peers have users with skin in the game. Mark Malek, Siebert Financial's chief investor, told BI that they can be useful sentiment indicators because they're "backed by real wagers" where people risk money, thereby "raising the bar beyond opinion."

Because they're staking their cash, users have an incentive "to seek out accurate information," and their bets are more likely to reflect their genuine view of what will happen, Hani Abuagla, a senior market analyst at XTB MENA, told BI.

But crowdsourcing wisdom in real time can have disadvantages. Live tracking of wagers makes these tools "susceptible to herd behavior and sentiment swings, where prices can be driven by momentum rather than fundamentals," Abuagla added.

He added that their "small size and low liquidity" raises the risk of manipulation and might limit interest from the most informed traders or a diverse enough crowd for them to be truly "wise."

These tools can be "more prone to emotion, hype, and political or behavioral bias," Broughel said, adding that there's "limited transparency" into who is betting and why.

Not a crystal ball

Kalshi uses the conventional definition of a recession— two consecutive quarters of negative GDP growth — while Polymarket's win conditions also include the National Bureau of Economic Research announcing a recession has occurred this year.

Broughel said the prediction platforms, while not perfect, were "reasonably capturing a growing consensus that a much-feared recession may not materialize in 2025."

Malek, the investor, said that interpreting a figure like Polymarket's 20% figure as a "literal probability of recession is likely flawed."

While there's a clear throughline between wider public sentiment that the platforms can reflect and who wins an election, there's "far more ambiguity, and far more variance" in what causes a recession and when the NBER will declare one, he added.

Malek added that the predicted likelihood of a recession falling on Polymarket or Kalshi doesn't indicate that one is less likely, but that "sentiment has improved. "

A Kalshi spokesperson told BI that it "opens up the ability to hedge adverse outcomes and to profit from convictions" — and the probabilities generated are "incredibly accurate and useful information."

Polymarket hadn't responded to a request for comment when this article went live.