Daniel C., 52 Engineer and consultant Glen Ellyn, Illinois
"I had over 10% of my net worth in a single equity--my employer's stock, and held on to it even when the market went south. I held on to it out of sentiment because it was my own company. In 2010, $50,000 worth of stock turned into a $27,000 tax loss."
My fix: "I know not to invest with sentimentality, and I pay more attention to my portfolio."
