Warren Buffett has just delivered his final shareholder letter, which includes his account of the time he fingerprinted nuns as an eight-year-old.

During a 1938 appendectomy at Omaha's St. Catherine's Hospital, young Warren received a professional fingerprinting kit from his Aunt Edie. His theory? "Someday a nun would go bad and the FBI would find that they had neglected to fingerprint nuns." He imagined J. Edgar Hoover himself coming to inspect his collection after they apprehended the wayward sister together.

The 95-year-old Oracle of Omaha shared this story while announcing he's stepping back from writing annual reports and speaking at meetings. Greg Abel will become CEO at year-end, although Buffett will continue to send his annual Thanksgiving messages to shareholders. 10

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