Commodities are things that people use or consume. These can be things like food and drink, metals, and energy sources like oil and gas. People buy and sell commodities like they buy and sell other things in the market. They may buy or trade commodities because they believe they will be worth more in the future. For example, if someone owned wheat, they could store it until the price of wheat goes up and then sell it for a higher price. Commodities are the things that help our economy run.