Shares, Not Bets
On PrometheX, you don’t place “bets” — you buy and sell shares that represent outcomes. This is an important distinction because it means you can trade in and out of positions anytime, just like stocks. Every market has a question (e.g., “Will the Fed cut rates in July 2026?”) and two or more possible outcomes. Each outcome has its own shares that you can buy and sell.How Share Prices Work
Every share on PrometheX is priced between 1.00 USDC. Here’s the key rule:**Yes shares + No shares always equal $1.00.** If Yes is $0.72, then No is $0.28. Always.
| Yes price | No price | What the market thinks |
|---|---|---|
| $0.80 | $0.20 | 80% chance Yes happens |
| $0.50 | $0.50 | Coin flip — market is undecided |
| $0.15 | $0.85 | Only 15% chance Yes happens |
Why Prices Move
Prices move based on supply and demand:- More people buy Yes → Yes price goes up, No price goes down
- More people buy No → No price goes up, Yes price goes down
Buying Shares
The APMM calculates your shares
Based on the current price and pool state, the APMM figures out how many shares you receive. If Yes shares cost $0.60 each, $10 gets you roughly 16.6 shares (minus a small fee).
Slippage is the difference between the price you expect and the price you actually get. Larger trades move the price more, which means more slippage. For most normal-sized trades, slippage is minimal.
Selling Shares
You can sell your shares at any time before the market resolves:
If the price has gone up since you bought, you make a profit. If it’s gone down, you take a loss. Either way, you don’t have to wait for the market to end — you can exit whenever you want.
When a Market Resolves
When the real-world event happens (or doesn’t), the market resolves — one outcome is declared the winner:| What you hold | Outcome | Payout per share |
|---|---|---|
| Winning shares | Your side wins | $1.00 USDC |
| Losing shares | The other side wins | $0.00 |
A Complete Example
Let’s walk through a full trade:You buy Yes shares
You think the Lakers have a better shot than 25%, so you spend 20 USDC and receive about 80 Yes shares (at 0.25 each).
The price moves
Other people start buying Yes too. The price rises to 0.40. Your 80 shares are now worth $32 — a $12 unrealized profit.
Key Things to Remember
You can only lose what you put in
You can only lose what you put in
Your maximum loss is the amount of USDC you spent. You can never owe more than your initial trade.
You can sell anytime
You can sell anytime
Don’t want to wait for the market to end? Sell your shares back at the current price whenever you like.
Prices reflect crowd wisdom
Prices reflect crowd wisdom
When lots of smart people trade on a market, the price often becomes a remarkably good estimate of the true probability. This is called the “wisdom of crowds.”
No gas fees
No gas fees
Every trade on PrometheX is gasless. The platform sponsors all blockchain transaction costs through account abstraction (a technology that lets the platform pay fees on your behalf).