Rule established by the Securities and Exchange Commission (SEC) that selling short can only be done on an up-tick or a zero plus tick. See: Selling Short; Uptick; Zero Plus Tick
Securities and Exchange Commission rule that selling short may only be done on an uptick (applicable for all exchanges other then TSX. (See Last Sale Rule).
SEC rule that selling short is only allowed on an uptick.
The Uptick rule is a financial regulations rule, relating to the trading of securities in the United States.