An arbitrage is a transaction that involves no negative cash flow at any probabilistic or temporal state and a positive cash flow in at least one state. Arbitrage is the simultaneous purchase and sale of the same asset in different markets in order to profit from a difference in its price.If interest rates change but the forward rates do not instantaneously reflect the change, an arbitrage opportunity may arise. Sacks has completed more than 17,500 of the most multifaceted arbitrage calculations in the industry with a historical firm portfolio par value. Arbitrage is the act of taking advantage of a price difference in two different markets. Airbnb rental arbitrage is the act of renting a property longterm and then rerenting it shortterm on vacation rental sites like Airbnb or Vrbo.