Polymarket files to list sports-event contract parlays
Polymarket is preparing to add the option to bet on sports parlays after filing for a Combinatorial Outcome Contract with the Commodity Futures Trading Commission.
According to the filing, Polymarket’s parlays would allow users to combine multiple event predictions into a single position, like a wager. The structure is very similar to parlays commonly used in sports betting, where every selection must win for the contract to pay out.
“Every outcome must be satisfied for the contract to resolve to US$1.00. The contract resolves to US$1.00 if and only if every leg is satisfied. If any single leg is not satisfied, the contract resolves to US$0.00, regardless of the outcomes of any remaining unsettled legs,” the filing explained.
Because the filing is a self-certified contract, Polymarket can list the parlays without prior approval from the Commodity Futures Trading Commission, with the planned launch date after May 21.
At the same time as the self-certification, Polymarket also filed for confidential treatment for its Combinatorial Athletic Outcome Contracts due to concerns about potential leaks of trade secrets or commercial information.
Earlier this month, it was revealed that Polymarket’s trading volume had fallen for the first time in eight months as it faced growing competition from rival Kalshi.
Charlotte Capewell brings her passion for storytelling and expertise in writing, researching, and the gambling industry to every article she writes. Her specialties include the US gambling industry, regulator legislation, igaming, and more.
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The Backstory
Why this push into parlays matters
Polymarket’s move to list combinatorial sports contracts lands at a volatile moment for prediction markets. The platform is attempting to broaden its product set while navigating a fragmented legal landscape and intensifying scrutiny from state regulators and Congress. Parlays, which require every leg to hit for a contract to pay, mirror familiar sportsbook formats and could deepen user engagement. But they also sharpen policy debates over where prediction markets end and sports betting begins, and who gets to decide.
The platform’s strategy sits at the intersection of federal oversight by the Commodity Futures Trading Commission and a wave of state actions seeking to rein in sports event contracts. The next phase will test whether the CFTC’s recent posture of active defense can shield federally regulated markets from a state-by-state clampdown, and whether new products like parlays can scale in that uncertainty.
How Polymarket rebuilt its US path
Polymarket’s return to the United States has been years in the making. The crypto-based prediction venue agreed to block U.S. users four years ago following a settlement with the CFTC over operating an unregistered platform. That stalemate broke only after the company bought crypto exchange QCX for $112 million, giving it a regulated on-ramp and a structure the CFTC could live with. The agency then issued a no-action letter on Sept. 3, clearing the way for a relaunch tied to contracts on athletic events, athletic spreads, total scores and election winners. The platform signaled it could reopen as soon as Oct. 3 and publicly leaned into a message of compliance-first innovation, with CEO Shayne Coplan telling regulators that crypto firms must “embody the spirit” of traditional financial rules while using new technology. See Complete iGaming’s coverage of Polymarket’s pending return and the no-action greenlight and product scope.
That regulatory reset is the foundation for Polymarket’s latest filing on parlays. By pursuing self-certification of a “Combinatorial Outcome Contract,” the company is using a well-worn CFTC pathway that lets designated exchanges list new products without prior approval if they attest to compliance. The approach is faster, but it also puts the onus on the platform to prove that sports-linked contracts meet the Commodity Exchange Act’s guardrails and do not run afoul of state gambling prohibitions.
Congress and leagues raise the stakes
Polymarket’s expansion plans have unfolded as political pressure escalates. Sen. Richard Blumenthal blasted a partnership between Major League Baseball and the platform while unveiling a bill to regulate sports event contracts like sports betting at the state level. The Prediction Markets Security and Integrity Act would push oversight away from the CFTC, curb federal exemptions and require state approvals familiar to sportsbooks. Blumenthal also flagged access by users age 18 as a core concern, contrasting it with the 21-and-over standard in regulated betting. Read more on the Senate push and the blowback to the MLB tie-up in Complete iGaming’s report on congressional scrutiny of Polymarket.
The proposal aligns with a broader state-led backlash. Nevada regulators have already won early court orders that block Polymarket and rivals from offering contracts in the state. The political optics are shifting too, as sports leagues face questions about whether partnerships with prediction venues blur lines with gambling products, particularly when contracts emulate parlays and props familiar to sportsbook users.
States versus federal authority moves to court
The jurisdictional fight is no longer theoretical. Kalshi, a competing prediction exchange, is suing the Maryland Lottery and Gaming Control Commission over a cease-and-desist order. Kalshi argues that its sports event contracts are federally regulated swaps on a designated exchange, not wagers subject to state gambling law, and has asked for an injunction to block state enforcement. The company recently won a temporary injunction against Nevada’s regulator, a narrow opening that could shape how courts parse the difference between federally supervised derivatives and betting. For details on the preemption arguments and the Nevada and Maryland flashpoints, see Complete iGaming’s coverage of Kalshi’s lawsuit and injunction bid.
These cases matter for Polymarket’s parlay plans. If courts side with states, platforms may face a patchwork of prohibitions and licensing demands that limit product rollout. A federal preemption win, by contrast, would strengthen the CFTC’s hand and give exchanges more certainty to list complex sports-linked contracts nationwide, provided they meet federal standards.
CFTC asserts its turf
The CFTC has moved from bystander to combatant. The agency filed an amicus brief to defend its jurisdiction over prediction markets and signaled it would wade into the tangle of roughly 50 active cases challenging federal oversight. In an op-ed and public statements, the chairman argued that event contracts serve legitimate economic functions and, under current rules, trade as swaps rather than gambling, positioning the agency to police manipulation and market integrity. The brief, headed to the Ninth Circuit, also supports Crypto.com in a dispute with Nevada’s regulator, underscoring the CFTC’s willingness to contest state encroachment. Read more in Complete iGaming’s report on the CFTC’s amicus brief and jurisdictional stance.
For Polymarket, the agency’s intervention is not just rhetorical cover. It could be pivotal if self-certified sports combinatorics face state challenges. A clear federal line would let venues design and launch products like parlays with fewer surprises, while still meeting surveillance, reporting and anti-manipulation duties under the Commodity Exchange Act.
New guidance narrows the playing field
Even as it defends jurisdiction, the CFTC is tightening expectations. The agency issued guidance to exchanges on sports event contracts, warning about manipulation risks and singling out markets tied to the actions of a single player as particularly vulnerable. The advisory aims to encourage innovation while reminding venues of obligations on insider information, investor protections and sensitive categories. It arrives amid a spate of state rulings, including an Ohio decision that treated Kalshi’s sports contracts as gambling under state law. For the full context, see Complete iGaming’s coverage of the CFTC’s advisory and consultation.
This guidance sketches the contours for combinatorial listings. Parlays that hinge on team outcomes or total scores could be easier to defend than player-centric props. But combinatorics amplify complexity, creating more nodes for potential integrity breaches across legs and counterparties, and demanding robust surveillance to detect correlated manipulation.
The competitive and compliance calculus
Polymarket’s timing reflects competitive pressure. Rival Kalshi is pushing into sports event contracts while battling state regulators in court, a strategy that could pay off if federal preemption holds. Polymarket’s parlay-style contracts offer differentiation and a familiar structure for users conditioned by sportsbooks. Yet they also invite higher scrutiny from lawmakers intent on closing what they view as a regulatory gap.
The stakes are clear. If the CFTC cements authority and exchanges adapt to its guidance, prediction markets could broaden their reach with products that rhyme with betting yet live under derivatives rules. If states prevail, platforms could be forced into a costly, fragmented compliance map or retreat to narrower offerings. Polymarket’s bid to self-certify sports combinatorics is a test of both the regulator’s resolve and the market’s appetite for complexity under a brightening legal spotlight.
