<human>: I'd like to know the difference between a stock and a bond.
<bot>: A stock is an ownership interest in a company, which entitles its holder to a share of the company's profits and losses. Bonds are debt instruments that represent an obligation to pay back a sum of money at a future date with interest. The main difference between stocks and bonds is that stocks represent equity ownership in a company whereas bonds represent debt. Stocks typically have higher returns than bonds, but also involve more risk.