NEW YORK ( TheStreet) -- I was asked to pick my most foolish and most wise stock trades. Picking the most foolish stock trade is no easy task -- not because I don't have any, but because there are so many.After 25 years of trying to beat the market I have made every mistake in the book, and invented a few new ones. In my mind I have made more foolish mistakes, but since Wall Street keeps score using dollars I will talk about one of my biggest losers. Although it plays a significant role, the amount of money lost isn't the primary reason for feeling foolish. My initial and repeated lack of discipline, and how easily I could have avoided (or mitigated) the trade, forces my head lower in shame. If you take anything away from this story, leave with a renewed sense of discipline, restraint and preparation in your investing. Because losing isn't about rotten luck, stock manipulators, the SEC, or anything/anyone else other than yourself. Here's the shortened highlight version of events.