Don’t bet on a ‘June Swoon.’ Here’s what the data show.

There is no such thing as a “June Swoon” on Wall Street.

Those who are predicting one—and there are many—reveal more about themselves than the stock market. The belief in fictional phenomena such as the June Swoon illustrates once again why investor sentiment plays such a powerful role in the markets, and why contrarian analysis is effective.

What’s…