🆚 Prediction markets vs betting — the difference

Both put money on an outcome, but they work very differently. A bet is a fixed contract against a bookmaker, at odds the bookmaker sets. A prediction market share is a tradeable instrument: priced continuously by an order book of participants, sellable at any moment before the event resolves, with a price that reads as a live probability estimate. Those differences change what you can actually do with a position.

Who is on the other side

With a bookmaker, you trade against the house: it sets the odds, takes your stake, and pays out from its own book. Its margin is built into the odds, and it manages its exposure by adjusting them.

In a prediction market there is no house taking the other side. You trade against other participants in an order book, exactly as in a stock or currency market. The venue matches orders; the price is whatever buyers and sellers currently agree on. When you buy YES at 40¢, someone else chose to take the other side of that trade at that price.

A position, not a ticket

A bet slip is a locked contract — placed, then held until the event settles. A prediction market share is an open position you manage:

• Exit early. Bought YES at 30¢ and the price moved to 60¢ on news? You can sell now and realize the difference without waiting for the event.
• Cut a position. Price moving against you? Sell part or all before resolution — at the current market price, which may mean a loss.
• Name your price. With limit orders, your order sits in the book and fills only at the price you set.
• Average in or out over time, as with any traded instrument.

This is the core structural difference: a prediction market position has a market value at every moment, not just a settlement value at the end.

Prices you can read

Because a winning share redeems for exactly $1, a share's price is a direct probability readout: 70¢ means the market collectively prices about a 70% chance. Betting odds encode the same information less directly, shaded by the house's built-in edge. In a prediction market, the price itself carries no bookmaker margin — trading fees are charged separately — Polyfox's is a flat 1% per trade.

On Polymarket specifically, positions and trades also settle on-chain, so anyone's trading history is publicly verifiable — the transparency that makes reading a trader's record and copy trading possible at all.

What is the same: risk

None of the structure above removes risk. A share of an outcome that does not occur goes to $0; markets can move sharply, resolve against you, or become illiquid, and exiting early can lock in a loss. Treat prediction market positions as what they are — volatile instruments — and never trade funds you cannot afford to lose. Regulation of prediction markets also differs by jurisdiction; it is your responsibility to know what applies where you live. This page is informational only, not investment or legal advice — see Legal notes.

Next steps

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