What started as a niche corner of the internet has evolved into a multibillion-dollar industry.

In 2025, prediction markets have become a substantial instrument for speculation and the forecasting of real-world events in both finance and media. Two major players in the sector, Polymarket and Kalshi, have amassed a combined volume of over $37 billion (€31.5bn) in wagers placed this year, according to the 2026 Digital Assets Outlook Report.

A prediction market is essentially a platform where people bet on what they think will happen, and the price of the bet becomes a forecast. For example, instead of asking people directly or through on-the-street interviews who they expect will win an election, you let people put money on their answer.

The market price tells you what outcome people collectively think is most likely, and the forecast updates in real time, which is why some believe prediction markets capture collective thinking better than polls.

The sheer amount of capital flowing through these exchanges has triggered a gold rush. This month, Kalshi secured a Series E funding round of $1 billion(€850mn) valuing the platform at $11 billion (€9.4bn).

Polymarket hit a milestone back in October when Intercontinental Exchange (ICE), the parent company of the New York Stock Exchange, announced a strategic investment of up to $2 billion (€1.7bn) and valued the platform at $8 billion (€6.8bn). Additionally, ICE became the distributor of Polymarket’s data to institutional investors globally.

The overall interest from financial institutions is undeniable. Terrence Duffy, the CEO of CME Group, the world’s leading derivatives exchange, described prediction markets as “a legitimate domain of speculation and information aggregation that our clients are demanding” during their third-quarter earnings call.

EU-based or homegrown prediction markets have yet to take off, and EU regulations have kept the existing ones largely offshore.

As platforms, prediction markets function similarly to a financial exchange. Users buy and sell binary contracts, betting yes or no, on the outcomes of unknown future events such as election results, corporate earnings reports and sports scores.

Typically, these contracts pay out $1 if the event occurs and $0 if it does not. For example, if a contract is priced at $0.50 it implies that the collective belief of the participants is pricing a 50% probability of an event occurring.

The relevance of prediction markets was cemented after the 2024 US presidential election and the 2025 German snap election. In both cases, these platforms functioned as real-time scoreboards, consistently pricing outcomes and delivering predictions that were nearly as reliable or even more so than traditional polling.

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