In December, the total size of the prediction markets reached $19.1 billion, setting a new all-time high and exceeding the previous record by roughly 35%.

The monthly volume leaders were:

• Kalshi — $7.0B
• Opinion — $6.7B
• Polymarket — $5.3B

The surge reflects rapidly growing demand for real-time, incentive-driven forecasting across politics, macroeconomics, geopolitics, and financial markets. Analysts note that prediction markets are increasingly viewed as an alternative signal layer alongside traditional polling, derivatives, and analyst consensus — especially during periods of high uncertainty and fast-moving events.