Resolution criteria on PolyGram: This event is for the upcoming Brazil Serie B game, scheduled for Sunday, May 31, 2026 between AC Goianiense and Goiás EC.
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
| AC Goianiense | 47% YES | 54% NO |
| Draw (AC Goianiense vs. Goiás EC) | 46% YES | 55% NO |
| Goiás EC | 46% YES | 55% NO |
AC Goianiense and Goiás EC will meet in a Serie B fixture on 31 May 2026. The current order book on Polymarket prices AC Goianiense's victory at 47 per cent implied probability, reflecting modest confidence in the home side despite their status as the larger club in Goiás state. The settlement window closes at 19:00 UTC on match day, allowing traders approximately six hours post-kick-off to assess final outcomes before resolution.
Both clubs have competed in Brazil's second tier in recent seasons, with AC Goianiense holding a historical edge in state derbies and higher average league finishes over the past decade. However, Goiás EC has demonstrated competitive strength in recent campaigns and maintains a committed supporter base. The 47 per cent probability suggests the market perceives this as a relatively even contest, neither side commanding decisive favouritism. Recent form, injury status, and squad composition closer to May 2026 will materially shift this pricing.
Traders should monitor team news releases and official Serie B fixture announcements in the weeks preceding the match. Managerial changes, player transfers during the off-season, and final league standings heading into late May will provide context for relative motivation and squad strength. Weather conditions in Goiás on match day and any last-minute squad adjustments announced within 48 hours of kick-off typically influence late trading activity on regional Brazilian fixtures.
This market settles from the official outcome published at https://www.cbf.com.br/futebol-brasileiro/competicoes/campeonato-brasileiro-serie-b. 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 "AC Goianiense vs. Goiás EC" 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 $2K 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.cbf.com.br/futebol-brasileiro/competicoes/campeonato-brasileiro-serie-b. 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 31 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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