This is an interesting question: do they solve the moral hazard and adverse selection problem as well as banks do?

一个有意思的问题出现了,他们可以向银行那样,处理好道德风险以及逆向选择问题吗

耶鲁公开课 - 金融市场课程节选

Expected value is good and variance is bad because that's risk; that's uncertainty.

期望值越高越好,方差就相反,因为方差代表着风险,也就是不确定性

耶鲁公开课 - 金融市场课程节选