A diversified portfolio of cash-generating businesses — from insurance and railroads to utilities — offered a haven during the latest bout of market volatility.

A diversified portfolio of cash-generating businesses — from insurance and railroads to utilities — offered a haven during the latest bout of market volatility.

The Berkshire CEO is a widely followed investor, and his letters are closely read.

Greg Abel will take Warren Buffett's post at year's end.

The Berkshire Hathaway chairman will continue to share his trademark wit and wisdom with shareholders via annual Thanksgiving letters.