There are fads and styles in the stock market just as there are in women's clothes. These can, for as much as several years at a time, produce distortions in the relationship of existing prices to real values almost as great as those faced by the merchant who can hardly give away a rack full of the highest quality knee-length dresses in a year when fashion decrees that they be worn to the ankle.
- from Common Stocks and Uncommon Profits book by Philip Fisher