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Dana White's Contender Series: Antonio Monteiro vs. Tyshawn Williams (Featherweight, Main Card)
polymarket
kalshi

Who will win Monteiro vs Williams?

Volume:
$1,142,658

Tyshawn Williams

 - Kalshi

Tyshawn Williams - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 16, 2026

Closed: Sep 15, 7:44 PM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Tyshawn Williams

View
100%
27%
Yes 100¢No 0¢
100¢
N/A
$538,970
N/A
N/A
$313,255
Settled
Yes
polymarket

Fight to Go the Distance?

View
100%
56%
Yes 100¢No 0¢
0.1¢
N/A
$1,487
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 1.5 Rounds

View
100%
Yes 100¢No 0¢
0.2¢
N/A
$516
N/A
N/A
N/A
Settled
Yes
polymarket

Fight won by decision?

View
100%
5%
Yes 100¢No 0¢
19¢
N/A
$110
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 0.5 Rounds

View
100%
Yes 100¢No 0¢
0.2¢
N/A
$25
N/A
N/A
N/A
Settled
Yes
polymarket

Decision or Draw

View
100%
Yes 100¢No 0¢
1¢
N/A
$20
N/A
N/A
N/A
Settled
Yes
kalshi

Antonio Monteiro

View
0%
28%
Yes 0¢No 100¢
100¢
N/A
$545,078
N/A
N/A
$312,429
Settled
No
polymarket

Antonio Monteiro vs. Tyshawn Williams

View
0%
29%
Yes 0¢No 100¢
—
N/A
$55,515
N/A
N/A
N/A
Settled
Yes
polymarket

Fight won by KO/TKO?

View
0%
56%
Yes 0¢No 100¢
—
N/A
$318
N/A
N/A
N/A
Settled
No
polymarket

Williams to win by KO/TKO?

View
0%
55%
Yes 0¢No 100¢
—
N/A
$260
N/A
N/A
N/A
Settled
No
polymarket

Williams in Round 1

View
0%
98%
Yes 0¢No 100¢
—
N/A
$181
N/A
N/A
N/A
Settled
No
polymarket

Monteiro to win by KO/TKO?

View
0%
89%
Yes 0¢No 100¢
—
N/A
$86
N/A
N/A
N/A
Settled
No
polymarket

Monteiro in Round 1

View
0%
97%
Yes 0¢No 100¢
—
N/A
$20
N/A
N/A
N/A
Settled
No
polymarket

Monteiro in Round 3

View
0%
97%
Yes 0¢No 100¢
—
N/A
$20
N/A
N/A
N/A
Settled
No
polymarket

Williams in Round 2

View
0%
97%
Yes 0¢No 100¢
—
N/A
$20
N/A
N/A
N/A
Settled
No
polymarket

Williams in Round 3

View
0%
97%
Yes 0¢No 100¢
—
N/A
$20
N/A
N/A
N/A
Settled
No
polymarket

Monteiro in Round 2

View
0%
97%
Yes 0¢No 100¢
—
N/A
$10
N/A
N/A
N/A
Settled
No
polymarket

Fight won by submission?

View
0%
18%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
No
polymarket

O/U 2.5 Rounds

View
100%
Yes 100¢No 0¢
0.2¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

Ends before Round 2?

View
0%
97%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
No
polymarket

Ends before Round 3?

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
No
Total markets: 21

Intro

This market tracks whether the Dana White's Contender Series fight between Antonio Monteiro and Tyshawn Williams will go Over/Under 2.5 rounds. Currently, the aggregated probability across Polymarket and Kalshi indicates a 100.0% chance of the fight going Over 2.5 rounds, as determined by official results from https://www.ufc.com/events. This aggregated view incorporates data from multiple sources into a single consensus. Keep an eye on the fight itself, scheduled for resolution on September 16, 2026, to see if the bout concludes before or after the 2.5-round mark.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Kalshi simplifies the win condition, lacking explicit handling for draws or no contests, potentially leading to resolution differences compared to Polymarket's more comprehensive criteria.Hero tip: Focus on the likelihood of a decisive win (KO, TKO, Submission, or Decision). Be cautious of markets where a draw or no contest is plausible, as Kalshi's resolution may differ from Polymarket's.

Critical divergence points:

  • Polymarket: Resolves to a specific fighter if they are officially declared the winner. Resolves to 50-50 for draws, no contests, cancellations, or postponements beyond September 29, 2026. "If the fight is declared a draw or technical draw, ruled a No Contest, not scored, canceled, or postponed beyond September 29, 2026, this market will resolve "50-50."
  • Kalshi: Resolves to 'Yes' if either fighter wins. Lacks explicit handling for draws, no contests, or postponements. "If Tyshawn Williams wins the Williams vs Monteiro professional MMA fight originally scheduled for Sep 15, 2026, then the market resolves to Yes. If Antonio Monteiro wins the Williams vs Monteiro professional MMA fight originally scheduled for Sep 15, 2026, then the market resolves to Yes."
Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.

Polymarket

This market will resolve to "Antonio Monteiro" if Antonio Monteiro is officially declared the winner of the fight against Tyshawn Williams at Dana White's Contender Series: Season 10, Week 6, scheduled for September 15, 2026. It will resolve to "Tyshawn Williams" if Tyshawn Williams 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 September 29, 2026, this market will resolve "50-50." The resolution source for this market will be official information from the UFC.

Kalshi

If Tyshawn Williams wins the Williams vs Monteiro professional MMA fight originally scheduled for Sep 15, 2026, then the market resolves to Yes. If Antonio Monteiro wins the Williams vs Monteiro professional MMA fight originally scheduled for Sep 15, 2026, then the market resolves to Yes.

Frequently asked questions

On Polymarket and Kalshi, this market tracks the probability of different outcomes for the Monteiro vs. Williams fight. Currently, there's a strong consensus view, with a volume of $1,142,658 across both platforms. Polymarket currently favors KO or TKO as the winning condition at 97 percent, while Kalshi also shows significant interest in this outcome. This dashboard aggregates data from these venues to provide a comprehensive overview of prediction market sentiment regarding how this featherweight main card bout will conclude. Traders on these platforms are expressing a clear expectation for a decisive finish.

Prediction market odds, like those found on Polymarket and Kalshi, often reflect a 'wisdom of the crowd' that can differ from traditional sportsbook lines. Sportsbooks set initial odds based on expert analysis and attempt to balance action on both sides, while prediction markets allow anyone to trade on their beliefs, leading to potentially more accurate probabilities. This market's implied probabilities, derived from the trading volume of $1,122,498 over the past 24 hours, may offer a different perspective than conventional betting sites. Discrepancies can arise due to differing information access and incentives between the two types of markets.

Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Prices on Polymarket and Kalshi can diverge due to variations in user base, trading activity, and market structure. Polymarket may attract a different demographic of traders with specialized knowledge, while Kalshi might have broader participation. These differences in participant expertise and risk tolerance can lead to differing price discovery. Furthermore, each platform has its own unique liquidity and trading fees, which can influence the prices observed for this market. The current volume indicates varying levels of conviction across the two venues, contributing to the observed price discrepancies.