I have learnt long time ago the market can be irrational.Problem is the market can remain irrational for a long long time. Trick is to not only find those stocks that the market has irrationally driven the share price down BUT to find those stocks that pay a good dividend/yield, this way you get paid while you wait for the market to come to its senses.
I believe PXT is one of those stocks. CRAZY underpriced, Crazy Yield.