Modern commodity markets began with the trading of agricultural products, such as corn, cattle, wheat and pigs in the 19th century. Modern commodity markets trade many types of investment vehicles, and are often utilized by various investors from commodity producers to investment speculators.
For example, a corn producer could purchase corn futures on a commodity exchange to lock in a price for a sale of a specified amount of corn at a future date, while at the same time a speculator could buy and sell corn futures with the hope of profiting from future changes in corn prices.