Sports

Trade: KBO: Doosan Bears vs. Samsung Lions

0% YES 100% NO

Opened · Settles

Resolution criteria on PolyGram: This is a market on the KBO baseball game between Doosan Bears and Samsung Lions, scheduled for May 31 at 1:00AM ET. This market will resolve to "Doosan Bears" if the Doosan Bears win the game. This market will resolve to "Samsung Lions" if the Samsung Lions win the game. 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, or ends in a tie, this market will resolve 50-50. The primary resolution source will be official information from the KBO. A consensus of credible reporting may also be used.

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.

Liquidity
—
Total Volume
$40K
24h Volume
—
Open Interest
$19K
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Market outcomes

KBO: Doosan Bears vs. Samsung Lions 0% YES100% NO

Market context

The Korean Baseball Organisation (KBO) fixture between Doosan Bears and Samsung Lions takes place on 31 May at 1:00 AM ET. The current order book on Polymarket reflects a 0% implied probability for a Doosan Bears victory, suggesting the market is pricing Samsung Lions as the overwhelming favourite or that liquidity constraints are limiting price discovery at the extremes.

Historical matchups between these two clubs provide context for evaluating the current probability. Both franchises are among the KBO's most competitive teams, with Samsung Lions having won the championship in 2020 and Doosan Bears maintaining consistent playoff appearances. Head-to-head records typically show competitive balance rather than dominance by either side, making a 0% probability for Doosan an extreme positioning that warrants scrutiny against recent form data and roster availability.

Traders should monitor roster announcements and injury reports in the days preceding the fixture, as the KBO season runs concurrently with international competitions that can affect player availability. Recent team performance records, pitching matchups, and any weather-related postponement risks should be tracked through official KBO communications and Korean sports reporting. The settlement window extends to 7 June, allowing for potential rescheduling if the original fixture is postponed. Current market depth at extreme probabilities often reflects limited order book activity rather than genuine consensus, particularly for matches with smaller trading volumes.

Wikipedia Context

  • Khorusan

    Khorusan is a village in Japelaq-e Sharqi Rural District, Japelaq District, Azna County, Lorestan Province, Iran. At the 2006 census, its population was 277, in 74 families.

  • Koro's Big Day Out
    Koro's Big Day Out

    Koro's Big Day Out is a 2002 Japanese animated short film written and directed by Hayao Miyazaki. The film is about Koro the puppy, who runs away from his mistress, experiences some adventures around town and who is finally happily returned home. The film is exclusively shown at the Ghibli Museum and Ghibli Park, both in Japan.

Resolution source

This market settles from the official outcome published at https://www.koreabaseball.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.

How to trade this market step by step

The mechanics for trading "KBO: Doosan Bears vs. Samsung Lions" 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.

  1. Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
  2. Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
  3. Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
  4. Size your position. If you stake 100 USDC at 0% YES, you'll receive shares that pay $200 if YES resolves true — a 100% gross return. If NO resolves, your shares are worth $0.
  5. Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
  6. Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.

How active is this market?

$40K in lifetime turnover and $0 of resting liquidity puts this market in the around 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.

Key terms

YES / NO share
A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.
CLOB
Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.
Liquidity
USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.
UMA optimistic oracle
The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.
Slippage
The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.
Conditional token
ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.

See the full prediction-market glossary →

Frequently asked questions

What is the current probability for "KBO: Doosan Bears vs. Samsung Lions"?

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.

How does this market resolve?

Resolution is sourced from https://www.koreabaseball.com/. Settlement is executed by the UMA optimistic oracle on Polygon, with a 2-hour dispute window before payouts clear.

When does this market close?

This prediction market is scheduled to close on 7 June 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.

How can I trade on "KBO: Doosan Bears vs. Samsung Lions"?

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.

What happens when the market resolves?

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.

Risk and regulatory note

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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