Violent weekly swings trigger an impressive internal recovery

Over the past five weeks, the S&P 500 has swung by 5% or more four times. That's tied for the 2nd-most volatile stretch since 1928. Fewer than 2% of its member stocks were holding above their 50-day averages; now more than 20% are. Similar bouts of volatility and internal reversals have coincided with the ends of bear markets more often than not.