Trading on Outcomes
How to buy and sell yes/no contracts.
Prediction market trading lets you buy and sell contracts on real-world outcomes. Unlike traditional betting, you can exit positions before events resolve— taking profits or cutting losses as probabilities shift.
How Contracts Work
Each contract represents a Yes or No position:
- Yes shares pay $1.00 if the event happens
- No shares pay $1.00 if the event doesn't happen
- Yes + No prices always sum to approximately $1.00
The spread between bid/ask is where the platform makes money.
Reading the Order Book
Like stock trading, prediction markets have bid/ask spreads:
- Bid – Highest price someone will buy at
- Ask – Lowest price someone will sell at
- Spread – Difference between bid and ask
Good to Know
Buying to Open
To enter a position:
- Decide if you believe Yes or No is more likely
- Buy the shares at the ask price (or place limit order)
- Pay the contract price per share
- Hold until resolution or sell to exit
If event happens, shares pay $1.00 each = $100 return.
Selling to Close
The key difference from traditional betting—you can exit early:
Exit Scenarios
| Situation | Action | Result |
|---|---|---|
| Price rose to $0.70 | Sell at bid | Capture $0.30 profit/share |
| Price dropped to $0.25 | Sell at bid | Cut loss at -$0.15/share |
| Wait for resolution | Hold | Get $1.00 or $0.00 |
Strategy Insight
Short Selling
To bet against an outcome, you can:
- Buy No shares – Pay for "it won't happen"
- Sell Yes shares short – Borrow and sell, buy back later (if supported)
Pro Tip
Limit Orders vs Market Orders
Order Types
| Order Type | Fills At | Best For |
|---|---|---|
| Market | Current ask (buy) or bid (sell) | Speed, liquid markets |
| Limit | Your specified price or better | Patience, volatile markets |
Trading Strategies
Momentum Trading
Buy when probability is trending in one direction:
- News breaks that increases likelihood
- Ride the wave as market reprices
- Exit before full resolution to capture estimated gains
Mean Reversion
Fade overreactions:
- Market panics on rumors or partial information
- Buy the overreaction if you believe it's excessive
- Profit as market normalizes
Arbitrage
Look for price discrepancies:
- Yes + No combined price differs from $1.00 significantly
- Same event priced differently across platforms
- Rare but low-variance when found
Platform Considerations
- Fees – Trading fees and withdrawal fees vary
- Settlement – How quickly events are resolved
- Disputes – What happens if outcome is ambiguous?
- Liquidity – Can you exit at fair prices?
Key Takeaways
- 1Contracts are Yes/No shares that pay $1 or $0 at resolution
- 2You can sell before resolution to capture gains or cut losses
- 3Bid/ask spread is the cost of trading—liquidity matters
- 4Use limit orders in volatile or low-liquidity markets
- 5Think like a trader: momentum, mean reversion, arbitrage
Sources & References
- Binary contract mechanics (Yes + No summing to $1.00, bid/ask spreads) follow standard financial market theory for event derivatives. Independently verifiable.
- Order book concepts (bid, ask, spread, market orders, limit orders) are standard financial market mechanics documented in any securities trading reference.
- Efficient Market Hypothesis (Fama, 1970). Arbitrage pricing theory applied to prediction markets: price discrepancies across platforms or between Yes/No contract pairs.
Mathematical claims are independently verifiable. BonusBell platform analysis reflects data from 220+ tracked platforms as of March 2026.