A derivative is a financial instrument whose value is derived from the value of another asset, known as the underlying. There are three main types of traders in the derivatives market: hedgers who use derivatives to reduce risk, speculators who trade for profits, and arbitrageurs who take advantage of price discrepancies across markets. Derivatives can be traded over-the-counter (OTC) or on an exchange, and provide various economic benefits such as risk reduction and enhanced market liquidity.