Over the years many have wondered how it was possible that a hedge fund could exist that did nothing more than ride momentum and heatmaps higher or lower without almost any insight into the fundamentals of the underlying corporations. That hedge funds, of course, is John A. Thaler’s JAT Capital, which did nothing but buy the most talked about, “storied” momo stocks and ride them higher. Or lower, as the case may be. Because the hedge fund which only managed $3.7 billion as of March 31 just because it was a Tiger Management spin off, is no more.