A split-second error at a UFC event created one of the most striking trades seen on Polymarket this week. A user turned a $676 position into roughly $67,000 after Bruce Buffer briefly announced the wrong winner in the heavyweight bout between Tyrell Fortune and Marcin Tybura. For a short window, the market treated the incorrect call as final and repriced the contract accordingly.
The dislocation was extreme and immediate. Fortune’s shares fell to $0.01 on Polymarket before the result was corrected and the market snapped back to $1.00. That kind of move shows how quickly prediction markets can absorb public information, even when that information turns out to be wrong moments later.
Hit my first 100x on Polymarket!
$670 → $67,000
but here's the crazy part: I almost bought Tybura at 99¢ with $100k. stopped, realized something was off.
cancelled my order, scooped up 1c shares instead. the UFC corrected the winner seconds later. easiest 100x ever https://t.co/vBO9eEA3pU pic.twitter.com/OM2XWVXfzI
— Verrissimus (@verrissimus) March 29, 2026
A brief mistake created a full-scale pricing distortion
According to the trading timeline, Buffer initially announced Tybura as the winner after the decision. That announcement lasted less than a minute before it was reversed and Fortune was officially confirmed as the unanimous-decision winner. In that short interval, traders who reacted to the first call pushed Fortune’s contract to near-zero.
One participant moved in the opposite direction. A trader identified on Polymarket as LlamaEnjoyer and on X as Verrissimus recognized the announcement as incorrect and changed course immediately. The trader canceled a near-$100,000 bet on Tybura and instead bought 67,600 shares of Fortune at $0.01.
When the UFC corrected the result, the position was suddenly worth its full payout value. The trader’s $676 outlay turned into about $67,600 in gross proceeds once Fortune’s shares returned to $1.00. The gain, roughly $67,000, came entirely from spotting the mismatch between the live announcement and the actual outcome faster than the rest of the market.
What the trade says about prediction-market risk
The trader summed up the decision in simple terms. “There’s no way Tybura won that fight,” he wrote, capturing the instinct that drove the trade before the correction arrived. In a market built on real-time probabilities, that conviction was enough to create a life-changing return in under a minute.
The episode is a reminder that prediction markets can turn human error into violent price swings almost instantly. When liquidity is thin and traders respond to a single official-sounding statement, even a brief mistake can create dramatic mark-to-market distortions. For active users, that means opportunity exists, but only alongside major execution risk.
Live-event markets need controls and planning for moments when official announcements are wrong, delayed or reversed. For traders, speed matters, but so does the ability to recognize when the market may be reacting to bad information rather than to the underlying result.