New Delhi, March 19 -- Most of us associate Berkshire Hathaway with Warren Buffett and the late Charlie Munger, but in the early 1970s they were part of a trio that also included Rick Guerin.

All three possessed exceptional analytical skills and a deep understanding of value investing principles. Yet most people have only heard of the first two. Buffett once said when markets crashed nearly 70% in 1973-74, Guerin, who had borrowed heavily to invest in equity, faced devastating margin calls. This forced him to sell his Berkshire Hathaway shares to Buffett for less than $40 each. Those shares are worth about $740,000 today, making this one of history's most expensive lessons in patience.

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