It would appear that the shorters had access to information that the general public did not, as they built their position up just before the Q3 results.
The good thing is that a lot of them covered at much higher prices than today, and many more may have covered since the end of November. Shorters realise that they can only push PSN down so far, as th company's cash position and continued cash flow underpin the share price.
PSN is not the kind of stock that the shorters can push to zero, and they know it.
It will be interesting to see the mid-December report, and how many more covered, again at higher prices than today.
Just one more reason to believe we have seen the bottom.