This Stock Just Dropped by 12% in 1 Day. History Says This Will Happen Next

Vertex Pharmaceuticals (VRTX 3.40%), a leading drugmaker, is performing exceedingly well for the year -- or at least it was, until it released its first-quarter update. The results were not to the market's liking, so much so that they led to a significant post-earnings dip for the stock. Shares are still in the green year to date, but only barely. However, Vertex's past stock-market meltdowns -- and what happened afterward -- might suggest that its most recent drop represents an excellent buying opportunity ...