Probably mid-high teens maybe? Low 20s?
Thanks, that's interesting. The leverage is actually making a bigger difference than I expected; I thought that the heavy concentration into your very best ideas was in itself a bigger part of the return.
Though I suppose that it still is, just in a different way: You need to be extremely confident to lever things up, and you probably can't get to that point with a diversified portfolio.
Did you start out investing like that, passing on anything that wasn't sure enough and then going very concentrated and levered? Or did you start with a more conventional approach to investing and over time you evolved that style because it suits your strenghts?