This Semiconductor Stock Just Dropped 18%. Is It a Buy Before It Recovers?

Sometimes a stock drop can be a buying opportunity for patient investors.Over the past 10 years, semiconductor equipment manufacturer ASML (ASML -1.70%) has been a massive winner, producing a total return of 761% vs. 270% for the S&P 500. But this has been a tough month. Since the company's latest earnings report in mid-October, the stock has dropped 18% -- a reaction to both results and guidance that fell below analysts' expectations.The post-earnings drop erased almost a year's worth of gains for ASML, re ...