Warren Buffett reminded investors to check emotions at the door during market volatility. His timely advice followed a turbulent April marked by sharp declines and subsequent recovery.

In 1993, Warren Buffett made what he later called his worst deal ever: the acquisition of Dexter Shoe. At first glance, Dexter seemed to fit the Berkshire Hathaway (BRK.A) (BRK.B) mold - strong brand, ...