Originally posted by Cirrus
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That's some might impressive compound interest though. The IPO for Berkshire Hathaway A class shares was $19 in 1964. They're now worth $335,720.00, 55 years later. Compound interest of, say 5%, each year would put the expected investment at 19*1.05^55=$278.
Also the "you invest" for a "number of decades" and "multi-billionaire" makes some pretty heroic assumptions about your starting pot.
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