Resolution criteria on PolyGram: In the upcoming Pro A game, scheduled for May 9 at 12:10PM ET: If the BCM Gravelines Dunkerque win, the market will resolve to "BCM Gravelines Dunkerque". If the Nanterre win, the market will resolve to "Nanterre". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. The result will be determined based on the final score including any overtime periods.
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
| BCM Gravelines Dunkerque vs. Nanterre | 0% YES | 100% NO |
BCM Gravelines Dunkerque, a French Pro A basketball club based in the northern port city, will face Nanterre in a league fixture scheduled for 9 May at 12:10PM ET. The current orderbook on Polymarket reflects a 0% implied probability for a Gravelines victory, indicating that traders are pricing the outcome as a near-certain Nanterre win. This extreme skew suggests either a significant disparity in current form, squad availability, or contextual factors influencing the matchup at settlement time.
French Pro A standings and recent performance metrics provide essential framing for interpreting this probability. Nanterre has historically been a stronger outfit in the league's upper tier, whilst Gravelines has fluctuated between mid-table and lower-table finishes in recent seasons. A 0% probability for the away side reflects not merely a form gap but trader consensus that the fixture outcome is effectively predetermined. Such extreme probabilities in sports markets typically emerge when one team faces injury crises, relegation scenarios, or plays a fixture with minimal competitive stakes relative to their opponent's objectives.
Traders should monitor squad news in the weeks preceding 9 May, particularly any announcements regarding key player availability for either side. League standings as of late April will clarify whether either team is fighting for playoff positioning or has already secured their season objectives, which materially affects motivation and lineup decisions. The settlement window extends to 16 May, allowing for fixture postponement or rescheduling; any cancellation without a make-up game triggers a 50-50 resolution, introducing tail-risk considerations into position sizing.
Basket Club Maritime Gravelines-Dunkerque, commonly referred to as BCM Gravelines-Dunkerque, is a French professional basketball club based in Gravelines, France. They currently play in the Pro A, the highest professional league in France. The team formerly played its home games at Sportica before that arena was destroyed by fire on 24 December 2023.
This market settles from the official outcome published at https://www.lnb.fr/. 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 "BCM Gravelines Dunkerque vs. Nanterre" 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.
$12K in lifetime turnover and $0 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.
As of today, traders on Polymarket price this outcome at 0%. The number updates continuously as the order book clears. PolyGram mirrors the same live odds with locale-aware formatting and USDC settlement.
Resolution is sourced from https://www.lnb.fr/. 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 16 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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