Arb Scanner · Sample edition
Arbitrage scanner
When the Yes prices on every outcome of a market sum to less than $1.00, you can buy all outcomes and lock in a guaranteed profit. We scan for those moments live.
Sample edition: scanned October 2, 2026 from live Polymarket prices. The full scanner re-checks dozens of multi-outcome markets every morning.
Live scan results
Yes prices sum to $0.990Guaranteed edge: 1.0%
Yes prices sum to $0.990Guaranteed edge: 1.0%
Yes prices sum to $1.000Guaranteed edge: 0.0%
Yes prices sum to $1.000Guaranteed edge: 0.0%
Yes prices sum to $1.000Guaranteed edge: 0.0%
How the arb works
Example — Senate control: Democrats Yes at 62.5¢ + Republicans Yes at 36.5¢ = 99¢. Buy 100 shares of each (100 × 62.5¢ + 100 × 36.5¢ = $99.00) and one side must win, paying out $100. That's about a 1% guaranteed return — if you can get filled at those prices.
⚠️ Before you jump in: these are last-trade prices, not the live order book — the actual fill may be worse once spreads and thin liquidity are factored in. Gaps this small often vanish in seconds as bots pounce. And never arb across markets with different resolution rules: "wins the Senate" must mean the same thing on every leg. Small edges are real, but they're a race.
Try it yourself
Every market above links to its live order book on Polymarket, where you can see the real bid/ask before committing. Open Polymarket →
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