Prediction market monthly trading volume crossed $20 billion in January 2026, up from $1.2 billion per month in early 2025 — a 16x increase in under a year. The sector's largest platform, Kalshi, closed a $1 billion Series F round on May 7 at a $22 billion valuation, doubling its December 2025 fi...
"United States senators have no business engaging in speculative activities like prediction markets while collecting a taxpayer-funded paycheck, period." — Sen. Bernie Moreno (R-Ohio), sponsor of the Senate prediction market trading ban
Prediction market monthly trading volume crossed $20 billion in January 2026, up from $1.2 billion per month in early 2025 — a 16x increase in under a year. The sector's largest platform, Kalshi, closed a $1 billion Series F round on May 7 at a $22 billion valuation, doubling its December 2025 figure of $11 billion. Annualized trading volume on Kalshi alone reached $178 billion, with institutional volume up 800% in six months, according to a company filing.
The expansion is not occurring in a regulatory vacuum. The CFTC withdrew its 2024 proposal to prohibit political and sports event contracts, replacing it with a new advance notice of proposed rulemaking (ANPRM) that closed on May 4 with over 1,500 public comments. Simultaneously, a federal-state jurisdictional war has escalated: on April 2, the DOJ and CFTC filed civil complaints against Arizona, Connecticut, and Illinois to block state-level gambling enforcement against CFTC-regulated prediction market operators. The U.S. Senate unanimously banned its members and staff from trading on prediction markets on April 30, days after Kalshi suspended and fined three congressional candidates for insider trading on their own campaigns.
The prediction market sector is now the fastest-growing segment of event-driven finance. Its trajectory raises fundamental questions about where derivatives regulation ends and gambling enforcement begins — a question the CFTC's 1,500-comment rulemaking has yet to resolve.
Monthly prediction market trading volume hovered around $1.2 billion through most of 2025, according to TRM Labs. The acceleration began in September 2025, when volumes entered what TRM described as "a new regime of sustained double-digit billions." By January 2026, combined monthly volume exceeded $20 billion. March 2026 set a record at approximately $26 billion, driven by geopolitics and sports contracts. April moderated slightly to $8.6 billion in taker volume across the two dominant platforms.
The single-day volume record was set on February 28, 2026, when Polymarket processed $425 million. The largest individual market — "Will US strike Iran?" — attracted $73 million by February 2026, according to TRM Labs data.
Unique monthly wallets interacting with on-chain prediction markets reached 840,000 in February 2026, nearly tripling over six months. User segmentation reveals a power-law distribution: mid-frequency traders (11–1,000 trades) accounted for 44.7% of trades and $869 million in volume; high-frequency market makers (over 10,000 trades) generated 35.2% of trades and $774 million; single-trade users contributed less than 0.2% of activity at $3.5 million.
Bitget Wallet projects the sector could reach $240 billion in annual volume in 2026 and $1 trillion by 2030, per an FXStreet report. These are projections, not forecasts with stated confidence intervals.
On May 7, 2026, Kalshi confirmed a $1 billion Series F round led by Coatue, with participation from Sequoia Capital, Andreessen Horowitz, IVP, Paradigm, Morgan Stanley, and ARK Invest. The round valued the company at $22 billion — double its $11 billion valuation from a December 2025 round that also raised $1 billion.
The company reported annualized trading volume of $178 billion, up from $52 billion six months earlier — a 3.4x increase. Institutional trading volume rose 800% over the same period. Kalshi co-founder Luana Lopes Lara, 29, reached a net worth of $1.3 billion on paper, making her the youngest female self-made billionaire, according to Fortune.
The capital will fund expansion of institutional products: block trading capabilities (Lopes Lara noted the platform already accepts block trades in the range of $20–30 million), broker integrations, and risk management tools designed for hedge funds, asset managers, and proprietary trading firms.
In late March, Kalshi received approval for margin trading for institutional clients. The same month, the exchange announced a partnership with ARK Invest, which manages over $15 billion in assets.
The competitive dynamic between Kalshi and Polymarket has reversed in 18 months. At the end of 2024, Polymarket commanded roughly 95% of all prediction market trading volume as the dominant crypto-native exchange. Kalshi, the CFTC-regulated U.S. exchange, held under 5%.
By September 2025, Kalshi's weekly notional volume share reached 62% against Polymarket's 38%. By April 2026, the gap widened: Kalshi posted $5.42 billion in taker volume versus Polymarket's $1.99 billion. Year-to-date through April 20, Kalshi held approximately 65% global market share versus Polymarket's 35%, with $37.49 billion in notional volume against Polymarket's $29.23 billion.
Polymarket retains advantages in two areas. First, fee revenue: Polymarket collected $29.22 million in April 2026 fees despite lower taker volume, suggesting higher-value or higher-margin contract structures. Second, user count: Polymarket drew 678,342 unique users in April, more than eight times Kalshi's implied user base.
The inversion reflects Kalshi's institutional pivot. Regulated status and margin trading attract larger order sizes. Polymarket's strength remains retail crypto-native users willing to trade on-chain via wallets. The two platforms appear to be diverging toward different user demographics rather than competing directly for the same traders.
Polymarket is pursuing re-entry to U.S. markets. In April 2026, the platform applied to the CFTC for approval to reopen its main exchange to American traders, following its $112 million acquisition of QCEX, a CFTC-licensed derivatives exchange and clearinghouse. However, state-level enforcement complicates the picture: Polymarket blocks users in Massachusetts, Illinois, and several other states as of April 2026.
The institutional migration is measurable. The 800% increase in institutional trading volume on Kalshi over six months is the headline figure. Behind it lies a structural shift: prediction markets are moving from retail speculation to institutional portfolio tools.
ARK Invest's partnership signals how asset managers view the product. Prediction market contracts offer binary exposure to discrete events — rate decisions, geopolitical outcomes, corporate earnings — that are difficult to replicate efficiently with options or swaps. The contract structure (binary, fixed payout, time-bounded) appeals to portfolio hedging use cases.
The March 2026 approval of margin trading for institutional clients was a prerequisite for scale. Without margin, position sizing was limited to fully collateralized contracts. With margin, institutional desks can deploy capital more efficiently, which explains part of the volume surge.
Kalshi's stated ambition extends further. CEO Tarek Mansour has said the company's goal is to "financialize everything and create a tradeable asset out of any difference in opinion." Separately, Kalshi has indicated that its contracts could eventually be available through 401(k) providers, according to CDC Gaming Reports.
The regulatory landscape is defined by a jurisdictional collision between the CFTC and state gambling authorities. The core legal question: are prediction market event contracts derivatives (federal CFTC jurisdiction) or gambling (state jurisdiction)?
The CFTC has moved to assert exclusive jurisdiction. In February 2026, the agency withdrew its June 2024 proposed rule that would have broadly categorized political and sports event contracts as "contrary to the public interest." In its place, the CFTC issued an ANPRM in March 2026 seeking comment on the scope and implications of "gaming" and "sports competition" in event contract listings.
The comment period closed May 4 with over 1,500 submissions. According to CoinSpectator, the responses revealed "not a policy debate but a structural deadlock" — industry groups arguing contracts are financial derivatives, and state gaming regulators (Tennessee, Missouri, Pennsylvania) plus consumer group Better Markets arguing the contracts lack "direct economic purpose" and fall outside legitimate derivatives definitions.
The federal government has escalated. On April 2, the DOJ and CFTC filed civil complaints against the governors, attorneys general, and regulatory authorities of Arizona, Connecticut, and Illinois, seeking injunctions against state enforcement of gambling laws against CFTC-registered exchanges. Arizona had filed a 20-count criminal information against KalshiEX on March 17, alleging illegal gambling without a license.
The preemption question remains unresolved. Federal courts have not issued definitive rulings on whether the Commodity Exchange Act preempts state gambling statutes as applied to CFTC-regulated prediction market platforms.
The prediction market industry's growth has created a novel insider trading risk. On April 22, 2026, Kalshi suspended and fined one U.S. Senate candidate and two House candidates for trading on their own campaigns — a form of political insider trading with no precedent in traditional securities markets.
A more serious case involved a U.S. Army Special Forces Master Sergeant who was indicted for allegedly using classified information to make bets on Polymarket related to the American military mission that captured Venezuelan leader Nicolás Maduro.
Separately, the Associated Press reported in April that a cluster of new Polymarket accounts made highly specific, well-timed bets on a U.S.-Iran ceasefire on April 7, generating hundreds of thousands of dollars in profits. The pattern suggested access to non-public information, though no charges have been filed.
The Senate responded on April 30 with a unanimous voice vote banning all senators and staff from trading on prediction markets, effective immediately. Sen. Alex Padilla (D-Calif.) broadened the measure to include staff. Rep. Ashley Hinson (R-Iowa) introduced a mirror resolution in the House in early May. Senate Minority Leader Chuck Schumer urged the House and White House to adopt matching restrictions.
Both Kalshi and Polymarket publicly supported the Senate ban. The industry calculates that congressional self-regulation reduces the political risk of broader restrictions that could constrain market growth.
Sports-related event contracts are the sector's primary volume driver and its greatest regulatory vulnerability. On Kalshi, 87% of March 2026 trading volume — $9.9 billion out of $11.39 billion — came from sports contracts, according to available data.
This concentration creates a paradox noted by iGaming Business: institutions are interested in prediction markets because of the growth driven by sports, but the industry pitches institutional adoption as a way to diversify beyond sports.
State gaming regulators view sports contracts as functionally identical to sports betting, which is regulated at the state level under the Professional and Amateur Sports Protection Act framework established after the 2018 Supreme Court ruling in Murphy v. NCAA. The CFTC views these same contracts as event derivatives under its exclusive federal jurisdiction.
The ANPRM's comment period surfaced this tension directly. The resolution will likely require either federal legislation or a Supreme Court ruling on preemption. Neither appears imminent.
The prediction market sector has undergone a structural transformation in under 18 months. What was a crypto-native niche with $1.2 billion in monthly volume has become a $22 billion institutional asset class processing $178 billion in annualized trades.
The economic value in the sector accrues primarily at two layers: the exchange layer (Kalshi and Polymarket capturing trading fees) and the institutional intermediary layer (brokers, market makers, and risk management providers). The regulatory outcome — whether these are derivatives or gambling — will determine which layer captures value long-term and whether state gaming commissions or the CFTC controls market access.
Two scenarios are plausible. If the CFTC prevails on preemption, prediction markets become federally regulated derivatives accessible nationwide, and the institutional buildout accelerates. If states prevail, the market fragments into a patchwork of state-by-state licensing requirements similar to sports betting, raising compliance costs and potentially slowing institutional adoption.
The data is clear on one point: institutional demand exists and is scaling. The 800% increase in institutional volume on Kalshi is not a projection — it is a reported figure. Whether that demand can be sustained depends on regulatory clarity that, as of May 2026, does not exist.