TOTAL VOLUME:
$71.3b
24H VOL:
$795,086,098
24H TRANSACTIONS:
683,469,929
OPEN INTEREST:
$1,943,078,483
638,610
Markets across
13,526
events
MATCHED EVENTS:
1,236
PLATFORM COVERAGE:
4
Polymarket:
48%
VS.
Kalshi:
52%
UFC Fight Night: Allan Nascimento vs. Mitch Raposo (Flyweight, Prelims)? Odds & Prediction Markets
Closed: Jun 20, 11:59 PM EST
Polymarket
Intro
This market tracks the over/under round duration for the UFC Fight Night preliminary flyweight matchup between Allan Nascimento and Mitch Raposo. Across Polymarket and Kalshi, the aggregated consensus shows 100.0% probability for the O/U 2.5 Rounds outcome. Resolution will be determined by official UFC records at ufc.com/events. Watch for the fight's completion on June 20, 2026, at UFC Fight Night: Kape vs. Horiguchi to see whether the bout concludes by the end of round two or extends beyond it.
PredictionHero - Resolution Divergence Alerts (RDA)
Divergence Detected
Issue:
Kalshi provides only a binary winner market without method-of-victory or round-duration specifications, while Polymarket offers comprehensive granular markets. Both platforms reference official UFC sources but Kalshi lacks detailed contingency rules.Hero Tip:
Use Polymarket for method-specific bets (KO/TKO, submission, decision, distance). Use Kalshi only for simple winner prediction. Confirm Kalshi's handling of draws, No Contests, and postponements before trading, as these are not documented in the provided source material.Critical Divergence Points:
Polymarket:
Offers 8 distinct markets: winner (Nascimento vs Raposo), distance (Yes/No), KO/TKO (general, Nascimento-specific, Raposo-specific), submission, and round thresholds (O/U 0.5, 1.5, 2.5). All resolve to 50-50 on No Contest, draw, technical draw, cancellation, or postponement beyond July 4, 2026. Source: Official UFC information. Key quote: 'If the bout is ruled a No Contest, not scored, canceled, or postponed beyond July 4, 2026, this market will resolve 50-50.'Kalshi:
Single binary market: resolves Yes if either Allan Nascimento or Mitch Raposo wins the fight scheduled for June 20, 2026. No method-of-victory, distance, or round-duration markets provided. Contingency rules (No Contest, draw, cancellation, postponement) not specified in source material. Key quote: 'If Allan Nascimento wins...then the market resolves to Yes. If Mitch Raposo wins...then the market resolves to Yes.'
Polymarket
This market will resolve to "Allan Nascimento" if Allan Nascimento is officially declared the winner of the fight against Mitch Raposo at UFC Fight Night: Kape vs. Horiguchi, scheduled for June 20, 2026. It will resolve to "Mitch Raposo" if Mitch Raposo is officially declared the winner. If the fight is declared a draw or technical draw, ruled a No Contest, not scored, canceled, or postponed beyond July 4, 2026, this market will resolve "50-50." The resolution source for this market will be official information from the UFC.
Kalshi
Resolution is based on the official result of the Nascimento vs Raposo professional MMA fight originally scheduled for June 20, 2026. If the fight is postponed or delayed, the market remains open and closes after the rescheduled fight concludes within two weeks. In the event of a tie or no contest, the market resolves 50/50 for both fighters. If the fight is cancelled or rescheduled beyond two weeks, the market resolves to a fair price in accordance with the rules.
Frequently asked questions
Prediction markets like those tracked here operate on continuous trading rather than fixed lines set by oddsmakers. Traders buy and sell shares reflecting their belief in each outcome, creating dynamic prices that adjust in real time. Unlike traditional sportsbooks, prediction markets often incorporate late-breaking information faster and reflect genuine crowd sentiment without the house edge built into conventional betting odds. This market-driven pricing can reveal edges, especially when public perception lags behind fighter performance data or injury reports. Many sharp bettors cross-reference both to identify mispricings.
Kalshi and Polymarket can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform attracts distinct trader demographics, liquidity pools, and regulatory frameworks that influence how prices evolve. Polymarket and Kalshi may weight recent news, social sentiment, or fighter metrics differently, and their user bases can have varying risk appetites or information access. Timing lags in order flow and differences in fee structures also create temporary spreads. These gaps typically narrow as the event date approaches and arbitrageurs exploit pricing inefficiencies, but they persist long enough for observant traders to identify value.
This market resolves around Jun 21, 2026, once the flyweight bout concludes and the result is verifiable from credible public sources. The outcome is determined by the official fight result—whether Nascimento or Raposo wins by decision, knockout, submission, or other sanctioned conclusion. Both platforms will confirm the winner based on verified reporting from the event promoter and athletic commission. Until that confirmation, prices remain live and traders can adjust positions as new information emerges.
Fighter injury reports, training camp updates, and recent performance footage can shift odds significantly. Weigh-in results, late withdrawals, or opponent changes would trigger sharp repricing. Social media momentum, analyst commentary, and betting action from recognized sharp bettors often precede broader market moves. Closer to Jun 21, 2026, final odds typically tighten as uncertainty resolves. Any credible news about either fighter's conditioning, gameplan adjustments, or personal circumstances may prompt traders to reposition, so monitoring MMA news channels and fighter social accounts remains valuable through fight week.
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