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The biggest betting event of the year is here
The NCAA’s March Madness tournament tips off this week, and the betting industry is bracing for one of its busiest periods of the year. Sportsbooks traditionally see a sharp spike in activity during the tournament, with operators pulling out all the stops — promotional offers, parlay deals and bracket-style contests — to capture new bettors at scale.
But 2026 marks a notable shift. For the first time, prediction markets are arriving at March Madness as genuine mainstream players rather than niche alternatives.
Prediction markets make their move
Kalshi’s March Madness champion market has already generated over $58 million in trading volume ahead of the opening games — a figure that underlines just how quickly these platforms are gaining traction. For context, the Super Bowl drove $500 million in trading volume on Kalshi alone earlier this year.
The current market picture has Duke leading at 22%, followed by Michigan at 18% and Arizona at 17%, with the top two seeing notable movement in recent days. Interestingly, those probabilities closely mirror the sportsbook consensus. DraftKings lists Duke, Michigan and Arizona as its top three favourites, while FanDuel currently has Arizona narrowly ahead of Duke and Michigan.
The alignment between prediction markets and traditional sportsbooks will be one of the most closely watched dynamics as the tournament unfolds — a real-time test of whether these platforms are converging on the same information or diverging in meaningful ways.
Integrity concerns cast a shadow
The tournament also arrives against a backdrop of growing concern about gambling integrity in college sports. The NCAA has called for a nationwide ban on individual college sports prop bets, citing the manipulation risks they create for student-athletes. The organisation recently introduced mandatory player availability reporting rules for March Madness — a first for any NCAA championship event — in a direct response to betting-related pressure on players.
What to watch
Beyond the basketball itself, two things are worth tracking closely over the coming weeks. First, whether prediction market trading volumes continue to climb as the tournament progresses — a strong signal that bettors are beginning to shift away from traditional sportsbooks. And second, whether the probability estimates on prediction markets continue to track closely with sportsbook odds, or whether the two start to diverge as the field narrows and the stakes get higher.
