INQSI GUIDE

Sports Arbitrage Examples

Transparent examples showing how two-way and three-way arbitrage math works.

Suppose two mutually exclusive outcomes are priced at +110 and +105. Those correspond to decimal prices of 2.10 and 2.05. Their inverse probabilities sum to about 96.39%, which is below 100% and therefore represents a mathematical arbitrage before execution considerations.

For a $1,000 total allocation, proportional staking by inverse decimal odds balances the gross payout. The same method extends to three-way markets by including all three mutually exclusive outcomes.

What to check

• Example prices are illustrative, not live sportsbook quotes
• Balanced staking uses each outcome’s inverse decimal price
• The edge disappears if one price changes enough before execution
• Three-way markets require all three outcomes to be covered