The act of buying and selling goods simultaneously in different markets to gain an immediate profit. Impressive, but tricky.Arbitrage is the simultaneous purchase and sale of the same asset in different markets in order to profit from a difference in its price. The simultaneous purchase and sale of the same securities, commodities, or foreign exchange in different markets to profit from unequal prices. Arbitrage is when an asset (stocks, currencies, etc.) is bought in one market and sold in another for a higher price. Supermarkets in San José. Statutory Functions Differ Among Library Boards. 2. In some older definitions, a tax haven also offers financial secrecy.