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Comparing 2 sources · Updated every 60s
Raul Rosas Jr wins is currently being traded on 2 exchanges: Kalshi and Polymarket. The best Yes price right now is 59% on Kalshi, and the best No is 90% on Polymarket. A cross-exchange arbitrage opportunity is currently live with an estimated 83.9% net return. Combined 24-hour volume across these markets is 52.1K contracts.
Best Yes
59%
Kalshi
Best No
90%
Polymarket
Cross-Source Spread
48¢
Source Count
2
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| Source | Yes | No | Change | Volume 24h | Total Volume | Open Interest | Liquidity |
|---|---|---|---|---|---|---|---|
| KalshiCombo | 59% ★ | 41% | -2 | 41.5K | 105.1K | 76.8K | High |
| PolymarketCombo | 11% | 90% ★ | -397d | 10.6K | 10.6K | 9.1K | High |
Raul Rosas Jr wins
Will Raul Rosas Jr. win by KO or TKO?
Select markets above to estimate combo odds. Place your combo on Kalshi
Buy YES on
Polymarket
11¢
Buy NO on
Kalshi
41¢
Total Cost
52¢
Gross Profit
48¢
Est. Fees
4.35¢
Net Profit
43.65¢
Return
83.9%
Disclaimer: Arbitrage calculations are estimates based on publicly listed fees. Actual fees, slippage, withdrawal timing, and market movement may affect realized returns. This is not financial advice. Always verify current fee schedules on each exchange before trading.
| Exchange | Trading Fee | Profit Fee | Withdrawal Fee | Notes |
|---|---|---|---|---|
| Kalshi | None | 7% | None | Trading exchange |
| Polymarket | 2% | None | None | Trading exchange |
Kalshi — Raul Rosas Jr wins
If Raul Rosas Jr wins the Rosas Jr vs Barcelos professional MMA fight originally scheduled for Sep 26, 2026, then the market resolves to Yes.
The following market refers to the Rosas Jr vs Barcelos professional MMA fight originally scheduled for Sep 26, 2026. If this fight is postponed or delayed, the market will remain open and close after the rescheduled fight has finished (within two weeks). If the fight is declared a tie or no contest, the market will resolve to 50/50 for both fighters. If the fight is cancelled or rescheduled to over two weeks away, the market will resolve to a fair price in accordance with the rules. This market and these products have not been endorsed by Zuffa LLC, d/b/a Ultimate Fighting Championship, UFC. Any references to the “UFC,” or any other associated marks are descriptive only, and do not indicate an endorsement of this product or any affiliation between Zuffa and Kalshi.
Polymarket — Will Raul Rosas Jr. win by KO or TKO?
This market will resolve to "Yes" if Raul Rosas Jr. defeats Raoni Barcelos at UFC Fight Night: Rosas Jr. vs. Barcelos, scheduled for September 26, 2026, by KO or TKO, including referee stoppage, doctor stoppage, or corner stoppage. Otherwise, it will resolve to "No." If the fight ends in a draw or by disqualification (either fighter), it will resolve "No." If the bout is ruled a No Contest, not scored, canceled, or postponed beyond October 10, 2026, this market will resolve "50-50." The resolution source for this market will be official information from the UFC.