An option contract is a form of financial asset called a derivative. The purchase of an option contract allows you to buy or sell certain underlying assets under specific conditions. You choose a price and a date on which to exchange this asset. When the time comes, you can choose to execute the contract if it's profitable, or let it expire if you don't. Here's what you need to know about option contracts. What are the options? While traders can base an option contract on virtually any tradable asset, the most common come in two forms: Commodity option, trading in tangible assets and raw materials; Stock options, commercial actions of a company. In an option contract, you have the right to buy or sell an underlying asset at a specific price and date. On the expiration date, your earnings, if any, come from the difference between the current market price of the asset and the price of your contract. This is why option contracts are called der...