The total value of all short sales in place in a customer's account at the end of the trading day.
Investopedia Says:
The short market value of an account is taken into consideration when determining whether a customer has met the margin requirement on a brokerage account. If the account has both a short market position and a long market position, both margin requirements must be met individually, or the account may be restricted until the margin requirement is met.
Related Links:
Have you ever correctly predicted a stock's decline or wondered how to be profitable in a bear market? Find out how and the risks involved. Short Selling Tutorial
Find out what margin is, how margin calls work, the advantages of leverage and why using margin can be risky. Margin Trading




