to maria bartiromo's wall street and now the conclusion of maria's exclusive interview with joel greegreenblatt. maria: what's your take on am don right now. a lot of team name amazon at the expensive one. is that trading at 100 times cash flow or 90 times cash flow? >> yeah, amazon is historically very expensive. and there are you know i call it the tea tyranny of the antidote. there are companies that trade at 80 times pretax earnings that are worthwhile. but if you look back over 20, 30, 40, 50 years, the worst strategy is to buy from companies that are losing money. you can pick out the diamonds in the rough and amazon, my bet, would be one of those. everyone knows that name. but it gets people speculating in other names that aren't quite as good of a business and throwing caution to the wind there and i think that's where you get hurt. amazon is run by a pretty special guy, tough to bet against him and tough to come up with a valuation. so some businesses you're putting in the too hard pile, you're not exactly sure what kind of a premium they're worth. but amazon is a unicorn that i don't