Did some research about short selling and I still don't understand a few concept: - Why would the broker want to lend stock and then take it back when it has less value? It's like lending your car to someone, have it crash it and then take it back. - When bank gives out loan, they take interest. When you short selling stock, you give back the exact amount of stock you borrow. That makes no sense in the broker side from a business point of view. Why would he want to lend them? To take in a few buck of commission?