Arbitrage is when an asset (stocks, currencies, etc.) is bought in one market and sold in another for a higher price. Arbitrage is the simultaneous purchase and sale of the same asset in different markets in order to profit from a difference in its price.Arbitrage is the simultaneous purchase and sale of an asset to profit from a difference in the price. Arbitrage is the strategy of taking advantage of price differences in different markets for the same asset. Sports betting arbitrage involves placing bets on all possible outcomes of a sports event with different bookmakers to ensure a guaranteed profit. In a nutshell, Airbnb rental arbitrage refers to the practice of renting properties just to sublet them on Airbnb.