March Madness handle jumps from $16m to $530m in one year

Scott Kaufman-Ross, the NBA's executive vice president, made a point on Friday that most people in the room understood as a concession dressed as a policy statement. The league had spent months deliberating which bets were "problematic" — opening tip winners, specific shots, under bets on players projected for fewer than twelve minutes — and had now sent a memo to FanDuel and DraftKings asking them to stop accepting some of them. Kaufman-Ross told ESPN the league had landed in "the right balance." What he did not say, but acknowledged plainly enough, is that the NBA has no mechanism to enforce any of this on prediction markets, because prediction markets are not its partners.

That gap is the whole story, and it keeps widening.

The S&P Global survey released last quarter found that seventy percent of prediction market users had traded sports contracts. Not political outcomes, not economic indicators — sports. March Madness handle on prediction markets went from sixteen million dollars in 2025 to a projected five hundred and thirty million in 2026. That is not a trend line. That is a structural shift in where sports betting volume lives, and it happened faster than any regulatory framework could follow.

The NBA understands this. That is why Silver was asking prediction market platforms for data access on insider trading risks before the memo even landed. The league is trying to extend its integrity architecture into a space where it has no contractual leverage. Kaufman-Ross's own words acknowledged the bind: enforcement "remains a difficult matter" without actual partnerships.

What strikes me about the current state is how much energy is being spent on the wrong problem. The NBA's memo targets the supply side — restrict certain parlays, remove under bets on limited-minute players — when the structural issue is that the demand has already relocated. Sportsbooks will comply, because their licences depend on league relationships. Prediction markets won't comply, not out of bad faith, but because there is no agreed framework under which compliance would even be defined. The CFTC's interim rule on sports event contracts has not resolved this. The Sixth Circuit's September ruling told states they could apply gaming laws, which pushed Underdog into a seventh lawsuit rather than toward a settlement. The Supreme Court has declined to intervene.

I have watched jurisdictional fragmentation play out in other contexts — moments when a product is genuinely between regulatory categories, and every authority acts as if capturing it is someone else's job until the volume is too large to ignore. Prediction markets on sports are at that inflection point now. The five hundred million dollar March Madness figure is the kind of number that makes regulatory inaction politically uncomfortable, regardless of which framework ultimately wins.

The NBA's memo is real pressure, even without enforcement teeth, because it signals to state attorneys general and to Congress what the league thinks the problem is. That framing matters. If the league successfully defines sports event contracts as an integrity threat requiring league oversight — rather than as commodity contracts requiring CFTC oversight — the political coalition for a different regulatory outcome starts to form. Kaufman-Ross is not just managing this season's prop bet exposure. He is building an argument.