Every trade on Polymarket, from a $5 weather bet to a seven-figure election position, runs through the same unglamorous mechanism. A dollar of collateral gets locked into a smart contract and split into two separate tokens. That mechanism is what people mean when they talk about polymarket conditional tokens, and it explains almost everything that looks strange about how the platform prices, settles, and resolves its markets.
What a Conditional Token Actually Is
A conditional token isn’t a cryptocurrency you buy on an exchange. It’s a claim on collateral that only pays out if a specific condition turns out to be true. Polymarket builds every market this way, using the Conditional Token Framework, an open token standard originally built by Gnosis.
Polymarket’s own documentation describes the framework as an ERC-1155 standard, which means outcome tokens behave like a specific class of blockchain asset instead of a generic coin. Each binary market creates exactly two tokens: a YES token and a NO token. One of them will be worth $1 once the market resolves, the other will be worth nothing, and no one decides which in advance — the real-world outcome decides it.
Older prediction market designs, like Augur’s original version, issued outcome shares as separate ERC-20 tokens, which meant deploying a brand new token contract for every single market. ERC-1155 lets Polymarket mint thousands of different outcome tokens inside one shared contract, since each token is identified by a numeric ID instead of its own address. That design cuts the gas cost of launching a new market, which is part of why Polymarket can list hundreds of new markets a day without each one needing its own costly contract deployment.
Splitting a Dollar Into Two Tokens
The process of creating those two tokens is called splitting. A trader deposits $1 of collateral into the CTF smart contract and receives one YES token and one NO token in return. Those two tokens always add up to the value of that original dollar, which is why traders describe YES and NO as mirror images of each other.
The reverse process is called merging. Anyone holding one YES token and one NO token from the same market can combine them back into $1 at any time, without waiting for the market to resolve. That’s a built-in exit that has nothing to do with buying or selling on the order book.
YES plus NO always equal $1, and that single rule is the reason Polymarket’s order book can price an entire market from just one side.
Why the Order Book Only Shows You One Price
Polymarket’s interface usually shows a single number, like 62 cents for YES. Underneath that number, the order book treats a bid to buy YES at 40 cents as mathematically identical to an offer to sell NO at 60 cents. Our breakdown of how the bid-ask spread works goes into how that one price actually hides two overlapping markets.
This is also why a market can look thin on one side and deep on the other, even though both sides trade the exact same underlying tokens.
What Happens When a Market Resolves
Resolution doesn’t erase the tokens. It just answers which one is worth something. Polymarket relies on UMA’s optimistic oracle to report the real-world outcome back to the smart contract. Once that report is final, the winning token becomes redeemable for $1 and the losing token becomes redeemable for nothing.
That resolution step has its own failure modes. We’ve covered several of the messier cases in our look at how Polymarket’s oracle actually works when a result gets disputed.
Collateral Switched From USDC to pUSD in 2026
Polymarket’s conditional tokens don’t exist in isolation. Each one is backed by whatever collateral the platform accepts, and that collateral changed in April 2026. Polymarket shipped a protocol upgrade called CTF V2 alongside a new native settlement token, pUSD, replacing the bridged USDC that had backed every split and every redemption since the platform launched.
The YES and NO tokens themselves didn’t change shape. A YES token still redeems for one unit of collateral if the market resolves in its favor. What changed is which stablecoin that unit is denominated in, which matters mostly for traders tracking tax basis or moving funds between Polymarket and other platforms.
Self-Custody: What You Can Actually Do With These Tokens
Because conditional tokens are standard blockchain tokens, they live in your wallet, not in a Polymarket account. That is different from a traditional sportsbook, where your bet exists only inside the bookmaker’s database.
You can send a YES or NO token to another wallet, trade it over the counter, or hold it through a resolution without ever touching Polymarket’s own order book. The tradeoff is that nothing stops you from sending a token to the wrong address, and there is no customer support line that can reverse a transaction once it confirms on-chain. That tradeoff is the price of owning the position outright instead of renting it from a platform.
Most traders never touch a smart contract directly. Polymarket’s interface handles splitting, merging, and redemption automatically behind the scenes. But the mechanics explain a few things that confuse new traders: you technically own a transferable token rather than a bet slip, and a market with zero visible trading volume can still have a valid, tradeable price the moment someone is willing to split a dollar. The same plumbing explains why Polymarket can list markets with more than two outcomes without changing how the system works underneath — each additional outcome is just another token split out of the same collateral pool.
The token standard itself is a small piece of Polymarket’s plumbing. Every quoted price, every sell button, and every resolved market trace back to the same split-dollar mechanism running underneath the interface. Once that mechanism clicks, the platform’s pricing, its one-sided order books, and its instant exits all stop looking like special features and start looking like the predictable output of two tokens that always add up to one dollar.
