NEW YORK ( TheStreet) -- It's easy for investors to share their greatest stock trades, but somewhat difficult to admit the big mistakes. Frankly, I learn much more from the mistakes than from the triumphs, but there are sometimes lessons in those, too. Most investors will have several of both, and can build on their knowledge with each success and failure.A well-known fund manager once told me that he had a board outside his office plastered with the stock certificates of the companies he'd taken positions in that turned out to be mistakes. Rather than burying his worst ideas, this manager was reminded of them each day as he entered his office. That, to me, is a brilliant way to reinforce what you have learned from the ideas that went bad.
Mistakes and Triumphs
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