MV Oil Trust (MVO)

[Investorman]

Buffet recently said that if he was working with a smaller amount of money (less than $100 million) he could produce annual returns of 50%. That would mean he was doubling his money every 18 months.

I don't think this is theoretical. He does have a personal investment account seperate from Berkshire that isn't public so he is probably talking from his real world experience.