Arbitrage Betting
Arbitrage betting is placing bets on every outcome of an event across different sportsbooks so that a profit is locked in regardless of the result.
Arbitrage (or "arbing") exploits price discrepancies between sportsbooks. When two books disagree enough about a market, you can sometimes back both sides at prices that guarantee a return no matter what happens. The profit comes from the books’ differing opinions, not from predicting the outcome — every result pays out more than the total amount staked.
For a two-way market, an arbitrage exists when 1/decimalA + 1/decimalB < 1, where decimalA and decimalB are the best available decimal prices for each side at any books. That sum is the total implied probability; when it falls below 1, the combined market is priced at under 100% and a risk-free margin exists. For example, side A at decimal 2.10 and side B at decimal 2.10 gives 1/2.10 + 1/2.10 = 0.952, an arbitrage worth roughly 4.8% before stake sizing.
Stakes are split inversely to the prices so each outcome returns the same total. Arbitrage opportunities are small, short-lived, and require fast execution across multiple funded accounts; lines move and books cut limits or void bets on suspected arbers. Indicative DFS or pick-em prices should be excluded from true arbitrage detection because they are not freely tradeable lines and produce false signals.