While she has some knowledge of how accounting works, Buffett writes, she wouldn't pass a CPA exam. A major asset for Bertie and investors like her: "She is sensible — very sensible — instinctively knowing that pundits should always be ignored," says Buffett. "Bertie understands the power — for good or bad — of incentives, the weaknesses of humans, the 'tells' that can be recognized when observing human behavior," Buffett writes. And so far, so good," Buffett writes. "Soon, things turned around and now that index hovers around 38,000," Buffett writes.

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Persons: Warren, Berkshire Hathaway, you'll, Buffett, Bertie —, Bertie Organizations: Berkshire, YouTube, Dow Jones Locations: Berkshire, America