99¢ Polymarket Price Explained
- Decimal
- 1.01
- American
- -9,900
- Fractional
- 1/99
- Implied probability
- 99.00%
- Polymarket
- 99¢
- $100 wins
- 1.01
- American
- -9,900
- Fractional
- 1/99
- Implied probability
- 99.00%
- Polymarket
- 99¢
- Profit
- 1.01
- Total return
- 101.01
1.010 decimal, -9,900 American, 99.00% implied probability
99¢ is what a YES (or NO) share costs when the market thinks the outcome is 99.00% likely. Because a winning share pays a dollar, dividing one by the price gives the decimal odds, 1.01, and from there the American price of -9,900.
What a 99¢ 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 101.01, a profit of 1.01.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 0.10 | 10.10 |
| 25 | 0.25 | 25.25 |
| 50 | 0.51 | 50.51 |
| 100 | 1.01 | 101.01 |
| 500 | 5.05 | 505.05 |
| 1,000 | 10.10 | 1,010.10 |
Break-even and long-run results
Because the price is a probability, the break-even rate is the price itself: 99.00%. If your own estimate of the outcome is higher than 99.00%, the share is value; if it is lower, it is not.
| Win rate | Return on stake |
|---|---|
| 50% | -49.5% |
| 55% | -44.4% |
| 60% | -39.4% |
| 65% | -34.3% |
| 99% | 0.0% |
At 99¢ the market is confident: an implied chance of 99.00%. High-priced shares pay little and lose everything on an upset, which is why traders in this range care about the spread and about fees more than about the headline price.
Converting 99¢ by hand
Treat the price as a probability: 99¢ is 99.00%. Decimal odds are one divided by that, 1.010, which bookmakers would display as 1.01. American odds follow from the decimal price: a favourite, so −100 divided by (1.010 − 1) gives -9,900. In fractional terms the closest traditional price is 1/99.
YES, NO and the spread
On a liquid market the YES and NO prices add up to about $1.00; at 99¢ the NO side should be near 1.00%. 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 1.010 decimal, at 5% 1.010. A sportsbook offering better than the effective price beats the market.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.010 | -10,102 | 99.02% |
| 5% | 1.010 | -10,421 | 99.05% |
Same price in other formats
Nearby prices
Frequently asked questions
What does a 99¢ price mean on Polymarket?
A share costs 99¢ and pays $1.00 if the market resolves in its favour, so the price is the market's probability: 99.00%. In sportsbook terms it is 1.01 decimal or -9,900 American odds.
How do I convert 99¢ to decimal odds?
Divide 1 by the price in dollars: 1 / 99¢ gives 1.010, shown as 1.01.
What is the NO price when YES is 99¢?
On a liquid market the NO side is about $1.00 minus the YES price, so roughly 1.00% in cents. The difference from exactly $1.00 in total is the spread.
Is 99¢ better than the sportsbook price?
Compare after fees. At 99¢ the share is worth 1.01 decimal before fees and 1.010 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 99¢?
100 dollars buys 100 / 99¢ shares, which pay 101.01 in total on a win: a profit of 1.01.