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 buying and selling of assets, profiting from the price difference between the price paid to buy and the price at the time of sale.Rental arbitrage is a business model where an individual or entity rents a property longterm and then rerents or sublets that property on a shortterm basis. Airbnb arbitrage usually means renting a home and then re-renting it on Airbnb. Arbitrage is a financial term that means taking advantage of different prices for the same assets in different markets.