$CSU.to. I actually missed the big moves and sold way too early but even still I managed to double my money in half a year. I've had lots of other doubles and larger but this was different. I had a huge position in it as it was going for 15x earnings, with no debt, growing 30% a year or something and holding a diversified set of niche software businesses. It didn't ever feel like there was much risk. I probably had 10% in it (for me that's huge) but always regret not making it larger. It was the near certainty that I would not lose and possibly make a huge gain that stands out.