> Well, for a certain definition of rational. I wasn't going too far afield -- by "rational" I meant on the basis of P/E ratios and other conventional sources

> Well, for a certain definition of rational. I wasn't going too far afield -- by "rational" I meant on the basis of P/E ratios and other conventional sources of information, rather than mass psychology or hunches. As to trading bots, depending on how much capital they move, they can twist a small market until it cries uncle, and in a matter of minutes in the worst cases. That's rational by some definitions. :)