IG Group CEO Corcoran Queries Prediction Market Volume, Sees Supreme Court Stepping In

IG Group (LON: IGG) CEO Breon Corcoran is questioning how major prediction market platforms report trading volume, while noting the U.S. Supreme Court may soon be forced to deliver critical legal clarity on event contracts.

Speaking at a recent event, Corcoran noted that clarity on the fate of sports derivatives could be coming “sooner than we anticipated,” adding that IG is ready to deal with a potentially adverse ruling from the Supreme Court. Some sell-side analysts have speculated that the high court could hear a prediction market case between next month and April 2027.

Following a series of diverging appellate court rulings, a broad coalition of gaming operators, prediction market exchanges, state gaming commissions, and major leagues—including the NFL—are eager for the Supreme Court to establish definitive rules on sports event contracts.

Near-term timing remains fluid. While multiple amicus briefs regarding election and sports event contracts sit before the justices, the Supreme Court’s recently published docket for its upcoming session does not yet formally include a prediction market case.

Legal Clarity Is Essential

Corcoran’s view on potential removal of legal ambiguity surrounding sports event contracts is meaningful because IG Group, a member of the FTSE 100 Index, is in the process of acquiring Underdog, putting the buyer squarely in the hypercompetitive U.S. prediction market arena.

The British trading platform operator announced in July 2026 that it agreed to pay $1.1 billion upfront for Underdog, with performance earnouts reaching up to $200 million—valuing the total transaction at up to $1.3 billion.

Corcoran noted that IG Group is prepared for the possibility that the Supreme Court will rule against sports event contracts. In industry circles, there’s belief that such a ruling would be advantageous to sportsbook operators because those companies could revert back to focusing on their core businesses while potentially benefiting from the loss of a competitive threat.

Furthermore, legal analysts suggest that ongoing controversies over event contracts could push additional states to legalize traditional sports wagering to secure tax revenue—funds not captured by offshore or federally exempt yes/no exchanges.

Corcoran Questions Notional Volume Metrics

Speaking at the event, Corcoran said some of the largest prediction markets are “talking up their notional traded volume with great gusto,” adding that the metric that really matters is net gaming revenue, not notional turnover.

While prediction market notional volume is often compared to sports betting handle, it’s a flawed comparison because the former measures the value of all traded contracts, not the amount of capital spent by traders.

Corcoran points out that IG is the only publicly traded company that’s discussed prediction markets revenue with any regularity, though he acknowledged Robinhood Markets (NASDAQ: HOOD) has done so in the past.