Another mistake many investors make is that they allow themselves to be influenced by what other people think. I made this mistake myself when I was still learning how to trade. I became friends with a broker and opened an account with him. We played this game called “bust the other guy’s chops when his stock is down.” When I had a losing stock position, 1 was embarrassed to call him to sell the stock because I knew he would he would ride me about it. If a stock I bought was down 5 or 10 percent, and I thought I should get out of it, I found myself hoping it would recover so 1 wouldn’t have to call him to sell it while it was down. Before I knew it, the stock would be down 15 or 20 percent, and the more it fell, the harder it became for me to call. Eventually, I learned that you have to ignore what anybody else thinks.Many people approach investing too casually. They treat investing as a hobby instead of like a business; hobbies cost money. They also don’t take the time to do a post-trade analysis on their trades, eliminating the best teacher: their results. Most people prefer to forget about their failures instead of learning from them, which is a big mistake.

They let their egos get in the way. An investor may put in hours of careful research building a case for a company. He scours the company’s financial reports, checks Value Line, and may even try the company’s products. Then, soon after he buys the stock, his proud pick takes a price dive. He can’t believe it! He makes excuses for the stock’s decline. He calls his broker and searches the Internet, looking for any favorable opinions to justify his position. Meanwhile, he ignores the only opinion that counts: the verdict of the market. The stock keeps sliding, and his loss keeps mounting. Finally, he throws in the towel and feels completely demoralized – all because he didn’t want to admit he had made a mistake in timing.