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XO is a prediction market. Each market states a question, its possible outcomes, the evidence that will decide it, and when it will be decided. You buy the outcome you think is underpriced. A winning share pays 1atsettlement,alosingsharepays1 at settlement, a losing share pays 0, and a voided market follows its published refund rules. A price is both a quote and a summary of what traders are currently willing to pay. A YES share offered at 40¢ costs 0.40andcanpay0.40 and can pay 1. That is a market-implied signal — not a forecast from XO, and not advice to trade.

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Four ways to use XO

Markets

Topical and event-driven questions. Trade outcomes on the order book, or on a legacy AMM page.

Convictions

Publish your own binary claim, define how it resolves, and back it with a seed order.

Pulse

Short-horizon BTC Up or Down, in rolling five-minute rounds.

Parlays

Pick one result for every match in a contest and enter with Conviction Points.

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Before your first trade

  • Use an eligible account and review any regional or product restrictions shown to you.
  • Fund your XO smart wallet. At the current launch surface the token picker is USDC-only.
  • Read the complete market rules, not just the title — the deadline, the primary evidence source, the secondary source and the void fallback.
  • Treat the amount you enter as capital at risk. A position can lose its full purchase cost, plus any fee shown before you confirm.
  • Check available liquidity. A market-style order can fill partially, or not at all, when the book is thin at your protection price.
Your first order-book trade may require an Enable Trading step. This grants your smart wallet’s USDC allowance and Conditional Token operator approval. It is an enabling transaction, not the trade itself.

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Next steps

Your first trade

Fund an account and buy a position, end to end.

How prices work

What 40¢ means, what it pays, and what a payout multiple is not.

Read the rules

The settlement contract behind every market.

Build on XO

The Orderbook and Data APIs for integrators.