It is an old argument....but I've come to be a devout believer in that believe. I know many have succeeded in "averaging down"...mostly day traders but not for the majority out there that are now "investors" (which have improved their game by becoming not hold forever investors)....which I must say I've become more of an investor also in the last 2 to 3 years. Still do the day trades...but there just fun trades...not major figure trades.