50¢ Polymarket Price Explained
- Decimal
- 2.00
- American
- +100
- Fractional
- evens
- Implied probability
- 50.00%
- Polymarket
- 50¢
- $100 wins
- 100.00
- American
- +100
- Fractional
- evens
- Implied probability
- 50.00%
- Polymarket
- 50¢
- Profit
- 100.00
- Total return
- 200.00
2.000 decimal, +100 American, 50.00% implied probability
A 50¢ share is the market saying the outcome is a coin flip. Decimal odds 2.00, American +100, and a NO side that should also trade at about 50¢. Any gap between YES plus NO and $1.00 is the spread.
What a 50¢ share pays
Each share pays $1.00 on a win, so the profit per share is a dollar minus the price. On 100 dollars' worth of shares the return is 200.00, a profit of 100.00.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 10.00 | 20.00 |
| 25 | 25.00 | 50.00 |
| 50 | 50.00 | 100.00 |
| 100 | 100.00 | 200.00 |
| 500 | 500.00 | 1,000.00 |
| 1,000 | 1,000.00 | 2,000.00 |
Break-even and long-run results
Because the price is a probability, the break-even rate is the price itself: 50.00%. If your own estimate of the outcome is higher than 50.00%, the share is value; if it is lower, it is not.
| Win rate | Return on stake |
|---|---|
| 50% | 0.0% |
| 55% | 10.0% |
| 60% | 20.0% |
| 65% | 30.0% |
A share at 50¢ is a near coin flip at 50.00%. Around 50¢ the spread between YES and NO is what matters: buying both sides at 51¢ and 51¢ costs $1.02 for a $1.00 payout, which is the market's margin.
Converting 50¢ by hand
Treat the price as a probability: 50¢ is 50.00%. Decimal odds are one divided by that, 2.000, which bookmakers would display as 2.00. American odds follow from the decimal price: an underdog, so (2.000 − 1) × 100 gives +100. In fractional terms the closest traditional price is evens.
YES, NO and the spread
On a liquid market the YES and NO prices add up to about $1.00; at 50¢ the NO side should be near 50.00%. Anything above $1.00 in total is the spread, the prediction-market equivalent of a bookmaker's vig. Enter both sides in the Polymarket converter to measure it.
Fees and comparison with sportsbooks
Fees, where a market charges them, come off profit and work exactly like exchange commission. At 2% the share is worth 1.980 decimal, at 5% 1.950. A sportsbook offering better than the effective price beats the market.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.980 | -102 | 50.51% |
| 5% | 1.950 | -105 | 51.28% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does a 50¢ price mean on Polymarket?
A share costs 50¢ and pays $1.00 if the market resolves in its favour, so the price is the market's probability: 50.00%. In sportsbook terms it is 2.00 decimal or +100 American odds.
How do I convert 50¢ to decimal odds?
Divide 1 by the price in dollars: 1 / 50¢ gives 2.000, shown as 2.00.
What is the NO price when YES is 50¢?
On a liquid market the NO side is about $1.00 minus the YES price, so roughly 50.00% in cents. The difference from exactly $1.00 in total is the spread.
Is 50¢ better than the sportsbook price?
Compare after fees. At 50¢ the share is worth 2.00 decimal before fees and 1.980 at a 2% fee. If a sportsbook offers more than that on the same outcome, the sportsbook is the better price.
What do I win per 100 dollars at 50¢?
100 dollars buys 100 / 50¢ shares, which pay 200.00 in total on a win: a profit of 100.00.