Sunday morning, 2am. Most of us were asleep. Somebody on a prediction market wasn't, and by sunrise a pro golf bettor was out $185,000.
An expensive lesson indeed for the Prediction Market Maker.
So what actually happened?
Round 3 of the Bermuda Championship ended Saturday with Austin Smotherman and Seamus Power tied at 16-under, two shots clear of Corey Conners, Taylor Moore and Ben Silverman. Round 4 was scheduled to start early Sunday to beat the wind. It never did. The PGA Tour reported gusts over 40 mph, multiple delays and a decision to call off play for the day. By Sunday afternoon, the Tour made the 54-hole standings official and set a Monday playoff between the two leaders.
Before the tournament got called, a trader parlayed the Top 5, Top 10 and Top 20 finishes through RFQs and hit Rufus’s quotes for $185K. RFQ means request for quote: the taker requests a price, and market makers respond. Rufus didn't name the venue, the legs or the prices, so nobody outside his book can say exactly which assumption broke.
The clear one though is that the leaderboard was frozen. The Tour pulled Round 4 forward to dodge the weather, and if Round 4 gets wiped out, the leaderboard stays as is. The parlay here was really just a position on “yes” of the tournament getting cancelled.
Same tournament, same strategy, different platform.
X User @DomsTheB0MB placed his version of the frozen leaderboard ticket on Courtside, which calls itself a free-to-play social sports prediction app that runs on virtual Courtside Coins and promotional sweepstakes.
Dom tweets he got a notice he won a whopping $248,833 a few minutes after Monday’s playoff ended, then found his account was suspended when he tried to go in and look at the green.
His original account put the entry on Saturday evening. In a follow-up correction on the same post, he said support told him the entries were placed Sunday at 9:30 and 9:39 a.m. That timing matters to the dispute. According to Dom's account of support's response, Courtside said the selections had been offered after Round 4 was cancelled and invoked it's obvious-error rule to void them. The draft also reports that the account was banned for exploiting those errors. As it stands now, it doesn’t look like Domthebomb will be getting his payout.
We’ve seen this movie before
Sports bettors have been trying to turn weather into an edge for years. At the 2024 Pebble Beach Pro-Am, weather cancelled the final round and Wyndham Clark won after 54 holes. Bettors had parlayed the leaderboard as it stood. One 20-leg Top 20 would have turned $20 into $755,415, per GOLF.com. It was voided, not paid. FanDuel told GOLF.com it voided every bet placed after Round 3, and all 72-hole match selections because 72 holes weren't completed. At the same tournament, Draft Kings voided five tickets combining for $325 of the current standings to finish as is that would have paid out $14.2 Million.
Who carries the pricing risk?
At a licensed sportsbook, the book is generally the counterparty. It writes the ticket, owns the house rules and answers to a regulator. Remember when the Draft Kings bettor stacked Nathan Lukes hit parlays? DK sought permission to void parts of the selections, and Massachusetts refused. The point is, a sportsbook has levers: void it, argue it, limit the account. Most of the time the levers work, sometimes the regulator says pay.
On Kalshi and Polymarket, the exchange isn’t on the other side. The market maker can carry the pricing risk. While sportsbooks are going to court and dealing with online outrage for voided bets, Peabody simply tipped his hat to whoever hit him. Of course, that doesn’t mean every trade on a prediction market is immune from corrections, disputes, or cancellations. But it is interesting to see the opposing outcomes on different platforms for similar situations.
Another wrinkle here is that if many makers actually do borrow their prices from sportsbooks, as Bloomberg reports, they are naturally borrowing their blind sports too.The forecast doesn't care where the quote came from.
What to look for next time
Nobody can say who was supposed to be watching the forecast: the taker, the maker or the exchange. But the pattern is worth knowing. A few questions to ask when you see a market like this:
Does it resolve on a state, like a leaderboard, that an outside event, like weather, can freeze?
Does the venue have written rules for a cancelled or shortened event, or just a price?
Is the person quoting it pricing independently, or borrowing numbers from a book that has its own blind spots?
Think anyone is in the wrong here, or the right? Let us know in the Discord.
This article reflects market activity and pricing across Kalshi and Polymarket, not directional predictions, trade recommendations, or investment advice. Prices shown are point-in-time and may change and vary by state or jurisdiction. Users must meet each platform's eligibility and age requirements to trade. PredictQ is a marketing partner of Kalshi and Polymarket and may receive compensation for referrals.