Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Buy or sell futures contracts
In general there are two types of futures contract, a put and call.  Both contract types have both common sides of a transaction, a buyer and a seller.  You can sell a put contract, or sell a call contract also; you're just taking the other side of the agreement.  If you're selling it would commonly be called a "sell to open" meaning you're opening your position by selling a contract which is different from simply selling an option that you currently own to close your position. A put contract gives the buyer the right to sell shares (or some asset/commodity) for a specified price on a specified date; the buyer of the contract gets to put the shares on someone else.   A call contract gives the buyer the right to buy shares (or some asset/commodity) for a specified price on a specified date; the buyer of the contract gets to call on someone for shares. "American" options contracts allow the buyer can exercise their rights under the contract on or before the expiration date; while "European" type contracts can only be exercised on the expiration date. To address your example.  Typically for stock an option contract involves 100 shares of a stock.  The value of these contracts fluctuates the same way other assets do.  Typically retail investors don't actually exercise their contracts, they just close a profitable position before the exercise deadline, and let unprofitable positions expire worthless.  If you were to buy a single call contract with an exercise price of $100 with a maturity date of August 1 for $1 per share, the contract will have cost you $100.  Let's say on August 1 the underlying shares are now available for $110 per share.  You have two options: Option 1: On August 1, you can exercise your contract to buy 100 shares for $100 per share.  You would exercise for $10,000 ($100 times 100 shares), then sell the shares for $10 profit per share; less the cost of the contract and transaction costs. Option 2: Your contract is now worth something closer to $10 per share, up from $1 per share when you bought it.  You can just sell your contract without ever exercising it to someone with an account large enough to exercise and/or an actual desire to receive the asset or commodity.