Sam HF 101, naked short to prevent squeeze. It's not just a myth, it's a method... BB
More info from the SEC: Naked Short Sales In a "naked" short sale, the seller does not borrow or arrange to borrow the securities in time to make delivery to the buyer within the standard three-day settlement period. As a result, the seller fails to deliver securities to the buyer when delivery is due; this is known as a "failure to deliver" or "fail."
For further information on short selling, naked short selling, and threshold securities, please see the Division of Trading and Markets' Key Points About Regulation SHO. Additional information relating to the SEC's activities relating to short selling can be found in the SEC Spotlight on Short Sales.
Not how that website works - it tracks only daily short covers and new shorts - of total short transaction volume yesterday, 70% were new shorts, 30% of previous shorts covered. What's of much more interest is the total short volume was 435k, on a day when volume for the stock was only 651k - only 216k (33%) of shares that changed hands weren't part of short transactions - usually only see those kinds of numbers during squeezes.