Long ago, Sir Isaac Newton <http://en.wikipedia.org/wiki/Isaac_Newton> gave
us three laws of motion, which were the work of genius. But Sir Isaac's
talents didn't extend to investing: He lost a bundle in the South Sea
Bubble<http://en.wikipedia.org/wiki/South_Sea_Bubble>,
explaining later, 'I can calculate the movement of the stars, but not the
madness of men.' If he had not been traumatized by this loss, Sir Isaac
might well have gone on to discover the Fourth Law of Motion: *For investors
as a whole, returns decrease as motion increases*.
