Resolution criteria on PolyGram: In the upcoming Saudi Professional League game between Al Najmah Saudi Club and Al Shabab Saudi Club, scheduled for May 21, 2026 at 2:00 PM ET: This event contains halftime result markets for home, draw, and away outcomes within the first 45 minutes of regular play plus stoppage time.
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
| Al Najmah Saudi Club | 49% YES | 51% NO |
| Draw | 49% YES | 51% NO |
| Al Shabab Saudi Club | 49% YES | 51% NO |
Al Najmah and Al Shabab meet in the Saudi Professional League on 21 May 2026, with this market settling on the halftime scoreline. The 49% implied probability for the YES outcome (Al Najmah win at half-time) reflects current order book depth on Polymarket, where traders are pricing roughly even odds between a home victory and either a draw or away result in the opening 45 minutes. This probability has formed through live trading activity and represents the marginal price at which the last transaction occurred.
Halftime results in the Saudi Professional League typically show home sides winning roughly 35–40% of the time in the first half, with draws accounting for 30–35% and away victories 25–30%, depending on the relative strength of competing sides. Al Najmah's home record and Al Shabab's away performance this season will be material reference points; teams with stronger defensive records tend to produce fewer halftime goals overall, which affects the distribution of outcomes. The current 49% probability suggests the market is pricing Al Najmah as a marginal favourite, consistent with home advantage but reflecting Al Shabab's competitive standing in the league.
Traders should monitor team news and squad availability in the days before kick-off, particularly regarding key attacking and defensive personnel. Fixture congestion in the Saudi Professional League schedule can affect team freshness and tactical setup. Weather conditions on match day—temperature and wind—may influence early-game tempo and passing accuracy. Any late tactical announcements from either manager could shift how aggressively each side approaches the opening period.
This market settles from the official outcome published at https://www.slstat.com/. 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 "Al Najmah Saudi Club vs. Al Shabab Saudi Club - Halftime Result" 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.
$0 in lifetime turnover and $37 of resting liquidity puts this market in the below the median by volume for sports contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.
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.slstat.com/. 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 21 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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