Two types of financial options exist, namely call options and put options. Under a call option, the buyer of the contract gets the right to buy the financial instrument at the specified price at a future date, whereas a put option gives the buyer the right to sell the same at the specified price at the specified future date. The price that is paid by the buyer to the seller for exercising this level of flexibility is called the premium. The prescribed future price is called the strike price.
Financial options are either traded in an organized stock exchange or over-the-counter. The exchange traded options are known as standardized options. The options exchange is responsible for this standardization. This is done by specifying the quantity of the underlying financial instrument, its price and the future date of the expiration. The details of these specifications may vary from exchange to exchange. However, the broad outlines are similar.
Financial options are used either to hedge against risks by buying contracts that will pay out if something with negative financial consequences happens, or because it allows traders to magnify gains while limiting downside risks.
Financial options involve the risk of losing some or all of the contract price, if the market moves against the trend expected, and counterparty risks, such as broker insolvency or contractors who do not fulfil their contractual obligations.