What is a Put Option?

A put option is a stock market derivative which gives the owner the right, but not the obligation, to sell the underlying stock, at a specified price, called the strike price to the seller of the put. Options are time limited and expire on a predetermined date, known as the expiry or maturity date. Put options are most commonly used in the stock market to either protect against, or profit from the decline of the price of the underlying stock.  The buyer of the put option  pays a fee to the seller (called a premium) to obtain this right.