Derivatives are financial instruments used for risk management and speculation. They derive their value from underlying securities and are commonly used in commodity, currency, stock, and bond markets. This article explores the various uses of derivatives, including hedging, speculation, and market efficiency. It also discusses different types of derivatives such as currency, interest rate, commodity, and equity derivatives. The article provides examples of companies using derivatives for hedging and includes a brief profile of Accord Financial, Starbucks Corporation, and Aegon NV.