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Writing or Selling a Call Option is when you give the buyer of the call option the right to buy a stock from you at a certain price by a certain date. In other words, the seller (also known as the writer) of the call option can be forced to sell a stock at the strike price. The seller of the call receives the premium that the buyer of the call option pays. If the seller of the call owns the underlying stock, then it is called writing a covered call.. If the seller of the call does NOT own the underlying stock, then it is called writing a naked call.. Obviously, in this instance it is naked because the seller does not own the underlying stock. The best way to understand the writing of a call is to read the following example.
Options at each expiration date come with a range of strike prices -- the stock prices at which the option can be exercised. For call options, the stock must move above the strike price to turn a profit; with puts, an option has value when the stock goes below the option strike price.