It is often the case that when the facts do not fit the argument it is so easy to fall back on simple gross exaggeration, and to persist in attempting to substantiate the position by broadening the criteria.
Here, by way of example, is what can truly be described as a "precipitously falling" share price:
The shares slumped 26 percent Thursday; the bank has lost half its value in just four days
http://www.nytimes.com/2008/11/21/business/21finance.html
Obviously, such blatant exaggeration regarding PTSC should be self-evident for what it is, and any direct response only serves to legitimate it, but unfortunately not the underlying motive. However, "The Basher's Handbook" might give an illuminating insight.
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Be well