[This FAQ has been excerpted, in part or its entirety, from Division of Market Regulation: Key Points About Regulation SHO]
A security's appearance on a threshold list does not necessarily mean that any improper activity has occurred or is occurring. An equity security will appear on a threshold list if it meets the definition of a threshold security set forth in Regulation SHO, meaning that failures to deliver the stock (i.e. to the party on the other side of the trade) have reached an aggregate of 10,000 shares or greater at NSCC for five consecutive settlement days and are equal to 0.5% of total shares outstanding.
Borrow Rates (per share)