Trade: New MLB CBA by Dec. 1?
Resolution criteria on PolyGram: This market will resolve to "Yes" if the MLB and MLBPA sign a a new collective bargaining agreement (CBA) by December 1, 2026, 11:59 PM ET. Otherwise this market will resolve to "No". A new CBA will be considered ‘signed’ only when the final written agreement has been formally signed by authorized representatives of both the MLB and the MLB Players Association. Tentative agreements, ratifications, or agreements pending signature do not qualify. The resolution source will be a consensus of credible reporting.
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
- $35
- Total Volume
- $6K
- 24h Volume
- —
- Open Interest
- $18
Market outcomes
| New MLB CBA by Dec. 1? | 40% YES | 61% NO |
Market context
The MLB and its players' union must negotiate and formally sign a new collective bargaining agreement by 1 December 2026 for this market to resolve affirmatively. The current CBA expires in December 2026, making this deadline effectively the natural negotiation window. The 43% implied probability on Polymarket's order book reflects meaningful uncertainty about whether both parties will reach a signed agreement within this timeframe, with traders currently pricing in a slight lean towards a deal not being finalised by the cutoff.
Historical precedent suggests labour negotiations in baseball frequently extend to the final weeks before expiry. The 2021 CBA took until mid-March to finalise, arriving just before spring training commenced. The 2016 agreement was signed in November, ahead of schedule. The 2011 lockout lasted 16 days into the season before resolution. These cases demonstrate that whilst deals do occur, they often arrive under deadline pressure, and occasionally negotiations breach the contract expiry date entirely—a risk factor embedded in the current 43% probability.
Key catalysts to monitor include formal negotiation commencement timelines, public statements from MLB Commissioner Rob Manfred and MLBPA leadership regarding negotiating positions, and any announced negotiation schedules. The union's internal ratification process, which follows a signed agreement, is distinct from the signing itself and does not count towards resolution. Traders should track whether substantive talks commence in mid-2026 and whether either party signals willingness to accept the other's core demands on revenue sharing, salary arbitration, and minimum salaries—the traditional sticking points in recent cycles.
Wikipedia Context
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How this market resolves
Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a two-hour dispute window opens, and if no one stakes a counter-claim the payout is final. Contested outcomes escalate to UMA token-holder voting. Payouts clear in USDC to the winning side.
How to trade this market step by step
The mechanics for trading "New MLB CBA by Dec. 1?" 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.
- Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
- Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
- 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.
- Size your position. If you stake 100 USDC at 40% YES, you'll receive shares that pay $250 if YES resolves true — a 150% gross return. If NO resolves, your shares are worth $0.
- 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.
- 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?
$6K in lifetime turnover and $35 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 4 months — the price has had time to stabilise as new information arrived.
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.
Frequently asked questions
What is the current probability for "New MLB CBA by Dec. 1?"?
As of today, traders on Polymarket price this outcome at 40%. 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 handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a 2-hour dispute window opens, and if uncontested the payout is final. Contested outcomes escalate to UMA token holders.
When does this market close?
This prediction market is scheduled to close on 1 December 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 "New MLB CBA by Dec. 1?"?
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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