Resolution criteria on PolyGram: This event is for the upcoming Primeira Liga game, scheduled for Monday, May 11, 2026 between Rio Ave FC and Sporting CP.
PolyGram is an on-chain prediction market where you trade YES or NO outcome shares with real USDC on Polygon. For this market, buy YES if you believe the event will happen, or NO if you think it won't. Your maximum loss is your stake — winning shares pay $1.00 each at resolution. Unlike sportsbooks, there is no house edge: prices are set by supply and demand from other traders and reflect the crowd's real-time probability.
Market outcomes
| Rio Ave FC | 7% YES | 94% NO |
| Draw (Rio Ave FC vs. Sporting CP) | 12% YES | 89% NO |
| Sporting CP | 82% YES | 19% NO |
Sporting CP will travel to Rio Ave FC's Estádio do Rio Ave on Monday, 11 May 2026 for a Primeira Liga fixture. The current order book on Polymarket prices a Rio Ave victory at 8 per cent implied probability, reflecting the substantial gap in competitive standing between Portugal's reigning champions and a mid-table side. Settlement occurs at 19:15 UTC on match day.
Sporting CP have dominated Portuguese football in recent seasons, winning multiple league titles and consistently finishing in the top two. Rio Ave, by contrast, typically compete in the lower half of the Primeira Liga table and have not won a domestic title in the modern era. Historical matchups between these clubs show Sporting winning roughly 70 per cent of encounters, with draws accounting for most Rio Ave results. The 8 per cent probability on the order book aligns with Rio Ave's underlying win rate against top-six opposition, though it does not yet price in late-season context—whether either side is fighting for European qualification or has secured their final position.
Traders should monitor team news in the week preceding the match, particularly injury status for Sporting's key players and any fixture congestion from European competitions. Rio Ave's recent form and whether they are playing for pride or points in the final stretch will also influence the probability. Late-season fixture scheduling sometimes affects motivation; if Sporting have already clinched the title or secured their European position, reduced intensity could shift the implied odds. Confirmation of final lineups typically arrives 90 minutes before kick-off.
This market settles from the official outcome published at https://www.ligaportugal.pt/. A proposer submits the final result to the UMA optimistic oracle on Polygon; the two-hour dispute window closes and payouts clear in USDC.
The mechanics for trading "Rio Ave FC vs. Sporting CP" are the same as any other PolyGram sporting event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.
$34K in lifetime turnover and $257K of resting liquidity puts this market in the around the median by volume for sports contracts on PolyGram. Order-book depth is exceptional — among the deepest order books in the category.
Last 24 hours alone saw $30K in turnover, well above the lifetime daily-average for this market — a clear sign of news catalysing trader activity right now.
The market has been open for under a month — fresh enough that information asymmetry remains a real factor.
Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.
Resolution is sourced from https://www.ligaportugal.pt/. Settlement is executed by the UMA optimistic oracle on Polygon, with a 2-hour dispute window before payouts clear.
This prediction market is scheduled to close on 11 May 2026. After the resolving event occurs, settlement typically clears within 24 hours once the UMA optimistic oracle confirms the outcome. All payouts are in USDC on the Polygon network.
To trade on this prediction market, create a free PolyGram account at polygram.ink, deposit USDC via Polygon, and place a YES or NO order on the outcome you believe in. You can learn more on our how-it-works page. Your maximum loss is limited to your stake — there is no leverage or margin.
When the outcome is determined, winning YES shares pay out $1.00 each in USDC, while losing shares pay $0. Settlement is handled by the UMA optimistic oracle on Polygon — a proposer submits the result, a two-hour dispute window opens, and if uncontested, payouts are distributed automatically. You can withdraw your winnings to any Polygon wallet.
Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.
Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.
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