Call and Put Options With Definitions and Examples Call and put options are derivative investments (their price movements are based on the price movements of another financial product, called the underlying). A call option is bought if the trader expects the price of the underlying to rise within a certain time frame. A put option is bought if the trader expects the price of the underlying to fall within a certain time frame. Call options are an agreement that give the option buyer the right, but not the obligation, to buy a stock, bond, commodity or other instrument at a specified price within a specific time period. Call Option - Investopedia Options - Understanding Calls and Puts Call Option Definition: Learn with Examples and Explanations Options - Understanding Calls and, puts. Call and put options are examples of stock derivatives - their value is derived from the value of the underlying stock. For example, a call option goes up in price when the price of the underlying stock rises. And you don't have.