Its valuation should be very attractive or at least reasonable -- otherwise you may buy at such a steep valuation that the stock will be as likely to retreat as to advance. Here are three promising companies whose stocks seem to have gotten ahead of themselves. Hershey (NYSE: HSY) has been a sweet investment for many people, outpacing the S&P 500 over the past decade with an average annual total return of roughly 14% versus 12% for the benchmark index.