A common pitfall that we see over and over is owning too much company stock in 401(k)s. This is at odds with diversified investing and magnifies your exposure to one single company that you’re already obliged to for your income. The worst case scenario does happen. Can you say Enron?

Danger In Your 401(k) - Forbes.com

Danger In Your 401(k)http://www.forbes.comOne might have guessed that it would be a long time before anybody was foolish enough again to tie up a big chunk of his retirement savings in the same enterprise that issues his paycheck. Apparently, a long time has passed.