But Munger made mistakes too, and cited Alibaba and Belridge Oil as two of his biggest investing errors. AdvertisementLegendary investor Charlie Munger was a shrewd investor who helped Berkshire Hathaway make billions. Here are the mistakes Munger has admitted to:Alibaba was 'one of the worst mistakes' Munger madeMunger's Daily Journal quadrupled its holding of Alibaba stock in the third quarter of 2021. Oil giant Shell acquired Belridge Oil in 1979 for about 30 times the price Munger had paid for the company's shares. "But I would have had twice as many billions if I'd just made a different decision about Belridge Oil."

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