True. I often times on ticker specific boards I am in tell people to look at the type of trade that brought a pps down. If a stock has a large spread often times literally a $2 trade can knock a ticker down 20 and 30%. Now, if a ton of trades are going thru and a pps is down large then that is a different story but down on just a single trade of very little money... usually nothing to worry about like you said.