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Trading Term

The risk to an investor (option writer) that the stock price will exactly equal the strike price at expiration. The investor will not know how many of their short options will be assigned or whether a last second move in the underlying will leave any long positions in or out-of-the-money. The risk is that on the following Monday the option writer might have an unexpected long or short stock position, and be subject to risk of an adverse price move.

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