figuring out there is no such thing as a free lunch but Markowitz tells us that diversification is a free lunch.

知道世上没有免费的午餐这回事,但马科维茨称分散投资是免费的午餐

耶鲁公开课 - 金融市场课程节选

As a matter of fact, Harry Markowitz called diversification a "Free lunch."

事实上,哈里·马科维茨,就把分散投资喻为"免费的午餐"

耶鲁公开课 - 金融市场课程节选