A Wobbling Stock Market

 | Aug 19, 2019 02:23AM ET

A third period of heightened volatility shouldn't surprise us.

Consider this chart of the S&P 500 over the past two years: take a look at the relative steepness of each of the red lines (rallies), the duration of each rally (purple lines), the blue boxes (volatile spots of bother) and the green line (market has gone nowhere for 19 months as every rally to new highs drops back to or below the high of January 2018).