This document discusses derivative instruments such as futures and forwards. It defines derivatives as instruments whose value is derived from an underlying security such as a stock, commodity, currency, or index. Future contracts obligate the buyer and seller to transact at a predetermined price on a future date, while forward contracts are similar but not standardized. Reasons for using derivatives include hedging against volatility and speculation. Key concepts discussed include short selling, holding long positions, and offsetting forward contracts before expiration to realize gains or losses.