I remember reading an article on trading psychology a few years ago that researched which of four scenarios was the least stressful after an initial purchase of a stock—a quick, big loss; a gradual, slight decline; a gradual, slight rise; or a quick surge higher. While most people would think that either of the latter two scenarios would cause the least stress—after all, the trader would have a profit in each case—it turns out that the second scenario (a gradual, tame decline) is actually the least stressful. Why? Because, after making the commitment, a small decline requires no action—the...