This document provides an overview of the derivative market. It defines derivatives and discusses their origins and functions, including hedging risk, speculating, and arbitrage. The main types of markets and derivative products are described, including forwards and futures, options, warrants, swaps, and contracts for differences. Trends in over-the-counter derivative markets are presented, such as the dominance of forex derivatives and increasing regulations. The document concludes that derivatives play a key role in financial markets globally and their use is expected to continue growing.