Stock exchanges are businesses like any other (albeit heavily regulated). Their main product is a marketplace for people to buy and sell stock. While they have

Stock exchanges are businesses like any other (albeit heavily regulated). Their main product is a marketplace for people to buy and sell stock. While they have many revenue streams, the typical ways they make money are through exchange fees (they charge fees for traders to buy and/or sell) and listing fees (you pay to have your stock listed). They also often sell data.