NextFin News - The prediction market landscape reached a significant milestone in February 2026, as the industry’s two dominant platforms, Kalshi and Polymarket, recorded a combined monthly trading volume of $17.87 billion. According to DeFi Rate, Kalshi processed $9.93 billion in trades, representing a 3.9% month-over-month increase, while the decentralized challenger Polymarket handled $7.94 billion, a 3.7% rise from January. This growth occurred despite a broader 14.5% contraction in the total tracked prediction market industry, which fell to $22.27 billion following a record-breaking January. The surge in activity during the final week of February—where volume rebounded 10.4% to $5.80 billion—was primarily catalyzed by U.S. President Trump’s State of the Union address on February 24 and a sudden escalation of military conflict in the Middle East on February 28. These events forced a rapid narrowing of the competitive gap, with Polymarket’s weekly volume jumping 31.9% to $2.40 billion, bringing it within striking distance of Kalshi’s $2.73 billion weekly total.
The divergence in performance between these two giants highlights a fundamental shift in how retail and institutional speculators utilize prediction markets as real-time information aggregators. Kalshi’s steady growth remains anchored in its aggressive expansion into the sports betting sector. During the final week of February, a staggering 76.1% of Kalshi’s volume—approximately $2.08 billion—was derived from sports, including significant interest in the NBA and PGA events like the Cognizant Classic. Conversely, Polymarket has successfully positioned itself as the primary venue for geopolitical and macroeconomic risk. Only 34.5% of Polymarket’s volume was sports-related, while politics and cryptocurrency markets accounted for over 62% of its activity. This specialization allowed Polymarket to capture the lion's share of the volatility surrounding the U.S. and Israeli strikes on Iran. Following the reported death of Ayatollah Khamenei, Polymarket’s Iran-related contracts accumulated over $200 million in volume within 48 hours, operating outside the restrictive oversight of the U.S. Commodity Futures Trading Commission (CFTC).
The impact of U.S. President Trump’s State of the Union (SOTU) address served as a critical proof of concept for "mention markets"—contracts that allow users to trade on whether specific phrases will be uttered during a public broadcast. Combined volume for SOTU-specific markets exceeded $17 million. Kalshi, leveraging its regulated status in the U.S., drew $11.97 million of this total. This suggests that while Polymarket wins on global geopolitical crises, Kalshi maintains a superior conversion rate for domestic political events that attract casual American viewers. However, the controversy surrounding the Khamenei markets—where Kalshi was forced to halt trading and settle positions early while Polymarket continued to trade through the volatility—underscores the operational advantages and risks inherent in decentralized versus regulated platforms. The 53.2% share of combined volume held by Kalshi at the end of February is the tightest the margin has been in over six weeks, suggesting that Polymarket’s lack of jurisdictional constraints allows it to scale faster during periods of international chaos.
Looking ahead, the data suggests a bifurcated trajectory for the prediction market industry. As the 2026 primary season intensifies, the "Trump effect" is expected to remain a primary liquidity driver. The high correlation between U.S. President Trump’s policy announcements and market spikes indicates that prediction platforms are no longer just betting venues but are functioning as shadow polling and sentiment analysis tools. For Kalshi, the challenge will be diversifying its volume away from a heavy reliance on sports to protect against seasonal lulls. For Polymarket, the focus will be on maintaining its lead in the "Big Three" categories—Sports, Crypto, and Politics—which currently account for 96.7% of its total volume. If geopolitical tensions in the Middle East persist into March, Polymarket may realistically overtake Kalshi in total monthly volume for the first time since the 2024 election cycle, marking a pivotal shift in the hierarchy of the global forecasting economy.
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