The Writing’s on the Wall

In light of the 30-year anniversary of the Black Monday Crash in 1987 (when the Dow lost more than 20% in “one day”, we should be reminded that investor anxiety usually increases when markets get to extremes. If stock prices fall steeply, people fret about money lost, and if they move too high too fast, they worry about sudden reversals. As greed is supposed to be counterbalanced by fear, this relationship should not be surprising. But sometimes the formula breaks down and stocks become very...