Anyone can call the main FINRA phone number at (301) 590-6500 to verify that the above post is accurate.
I wish that FINRA would have such an explanation on its website or otherwise confirm in a public statement as short selling is so often used in an attempt to explain share price drops in PKs and keep investors holding until the shorts supposedly have to cover.
However if the supposed short sales weren't legitimate shorts (i.e. dilution or just market selling), those who bought or continued to hold based on the short selling + later covering concept, end up losing.
The majority of PK share price drops that are blamed on shorts turn out to be dilution from the companies and their various financiers from what I have seen in the last decade.
Be very cautious about believing anything about shorts being responsible for share price drops.