Prediction markets processed $23.9 billion in notional volume in March 2026, up from $1.9 billion in March 2025 — a 1,158% year-over-year increase. Monthly unique wallets tripled to 840,000 in six months, according to TRM Labs. The two dominant platforms, Polymarket (blockchain-native, Polygon/US...
"We're not betting on prediction markets. We're building the infrastructure for a new asset class." — Jeffrey Sprecher, Chairman & CEO, Intercontinental Exchange (October 2025)
Prediction markets processed $23.9 billion in notional volume in March 2026, up from $1.9 billion in March 2025 — a 1,158% year-over-year increase. Monthly unique wallets tripled to 840,000 in six months, according to TRM Labs. The two dominant platforms, Polymarket (blockchain-native, Polygon/USDC) and Kalshi (CFTC-regulated DCM), now command combined weekly volumes exceeding $5 billion.
The capital behind these platforms tells the real story. ICE, parent of the New York Stock Exchange, has committed $1.64 billion to Polymarket at a $9 billion valuation. Kalshi closed a $1.1 billion Series E in December 2025 at $11 billion and is now seeking $20 billion. These are no longer fringe crypto experiments. They are institutional-grade financial infrastructure plays — and they are now colliding with Congress, the CFTC, and state gaming regulators simultaneously.
This report examines the economic architecture, regulatory fault lines, and competitive dynamics of the two platforms that collectively account for over 90% of global prediction market volume.
According to TRM Labs, monthly transaction volume across prediction markets grew from $1.2 billion in early 2025 to over $21 billion by January 2026. March 2026 pushed higher still, reaching approximately $23.9 billion.
The growth is not purely speculative recycling. Unique wallets participating monthly more than tripled to 840,000 in the six months leading to February 2026, per TRM Labs data. Transactions per daily active user peaked near 37 earlier in Q1 2026 before settling around 25 — suggesting a maturing user base that trades frequently but within defined behavioral patterns.
On February 28, 2026, Polymarket set a single-day volume record of $425 million, surpassing the previous high set on U.S. Election Day 2024. The catalyst was geopolitical: an Iran-related market ("Khamenei out as Supreme Leader of Iran by February 28") surged from $23,000 to $29.6 million in volume within 24 hours — a 1,275x increase.
The composition of trading has shifted materially. Geopolitics, macroeconomics, and politics — not crypto-native events — now drive the majority of activity, according to TRM Labs. This repositions prediction markets as real-time sentiment infrastructure rather than crypto-gambling venues.
From 2006 to 2020, designated contract markets listed an average of approximately five event contracts per year. In 2025, DCMs certified approximately 1,600 event contracts for listing, according to CFTC data.
Polymarket operates on the Polygon blockchain, settling trades in USDC via peer-to-peer smart contracts. The platform implemented an updated taker fee structure on March 30, 2026, and is projected to generate $800,000 to $1 million daily — roughly $300-365 million in annualized revenue.
Fee structure details:
The long-term monetization thesis rests on the POLY token. Once activated, token-based fee accrual is expected to constitute 90% or more of future reportable income, according to Sacra. This is the singular mechanism required to justify current $9-15 billion valuation expectations.
Kalshi operates as the first CFTC-designated contract market for event contracts in the United States. The platform crossed $1 billion in revenue run rate, with some estimates placing it at $1.5 billion as of early 2026, according to Sacra.
Fee structure details:
The economic contrast is stark. Kalshi charges roughly 100x Polymarket's U.S. fee rate but generates substantially more revenue today. Polymarket's bet is that volume supremacy at near-zero fees, combined with eventual token economics, will outrun Kalshi's higher-margin, lower-volume model.
Total institutional capital committed: approximately $1.85 billion.
The ICE partnership extends beyond capital. ICE serves as global distributor of Polymarket's event-driven data and has agreed to co-develop tokenization initiatives. In February 2026, ICE launched the Polymarket Signals and Sentiment tool, normalizing prediction market data into structured feeds displayed alongside bond yields and S&P 500 futures on institutional terminals.
Both platforms are now valued in ranges typically associated with mid-cap public exchanges. For context, Cboe Global Markets has a market capitalization of approximately $22 billion. The prediction market duopoly is approaching parity with traditional exchange infrastructure in terms of investor pricing, if not yet in revenue.
On March 12, 2026, the CFTC issued an Advanced Notice of Proposed Rulemaking (ANPRM) soliciting public comment on prediction market regulation. The comment period closes April 30, 2026. Simultaneously, the CFTC formally withdrew its June 2024 proposed rules that would have restricted "gaming" event contracts — a signal of willingness to permit an expanded range of contracts, including political and sports-related events.
The CFTC has formally classified prediction markets as "designated contract markets" subject to core principles: manipulation prevention, market integrity, and participant protection. Key open questions in the ANPRM include margin trading requirements, insider information controls, and public interest determinations.
Two bipartisan Senate bills introduced in late March 2026 target prediction market scope:
Neither bill has scheduled committee hearings. Analysts give the narrower Schiff-Curtis bill slightly better odds of advancing given its focused scope and bipartisan sponsorship.
In January 2026, the Nevada Gaming Control Board filed suit against Polymarket to halt sports-related contracts, arguing they constitute unlicensed gambling. The CFTC's designation of prediction markets as "swaps" under exclusive federal jurisdiction creates a direct preemption question: do state gambling regulators have authority over federally licensed DCMs?
This three-front regulatory environment — federal rulemaking, congressional legislation, and state enforcement — creates material uncertainty for both platforms. Kalshi's existing CFTC license provides partial insulation. Polymarket's $112 million acquisition of QCEX in July 2025, which secured a CFTC exchange and clearinghouse license, was designed to close that gap.
Sports contracts are the growth driver Kalshi and Polymarket cannot afford to lose. Kalshi's record $291 million single-day volume on January 1, 2026 was "largely fueled by the platform's expansion into sports," according to the platform's disclosures.
The collision with the $20+ billion U.S. licensed sports betting industry is the primary catalyst for congressional action. State-licensed sportsbooks operate under strict state-by-state regulatory frameworks, pay licensing fees, and remit gaming taxes. Prediction markets operating under CFTC jurisdiction do not. The economic asymmetry is the core complaint.
The Schiff-Curtis bill targets this asymmetry directly: if sports contracts are banned from prediction markets, the platforms lose a significant volume driver but retain their macro, political, and geopolitical markets — the categories that currently generate the majority of trading activity.
Applying an economic value lens to prediction market infrastructure reveals a distinctive fee distribution:
The value capture pattern differs from most DeFi protocols. Neither platform distributes fees to token holders today (Polymarket's POLY token accrual mechanism remains unactivated). Revenue flows primarily to the platform operators and their institutional investors.
Prediction markets have achieved escape velocity from their crypto-native origins. Monthly volumes now rival mid-tier futures exchanges. Institutional capital from NYSE's parent company and Sequoia Capital has repriced these platforms into the exchange infrastructure category.
The economic question is whether the current valuations — $9 billion for Polymarket, $11-20 billion for Kalshi — can be sustained by the underlying fee economics. Kalshi's $1.5 billion revenue run rate at current volumes supports its valuation under traditional exchange multiples. Polymarket's valuation depends almost entirely on future POLY token economics that remain unactivated.
The regulatory question may prove more determinative than the economic one. The CFTC's April 30 comment deadline, pending Senate legislation, and ongoing state litigation will collectively define what prediction markets are allowed to trade — and by extension, whether the volume growth that justifies these valuations can continue.
The data shows prediction markets have become material financial infrastructure. Whether they remain so depends on decisions being made in Washington, not in smart contracts.