我们更喜欢与平凡的事物合作,因为那是真实生活发生的地方
Those who deny freedom to others, deserve it not for themselves; and, under a just God, can not long retain it.
If you can dream it, you can do it.
当且仅当所有投资者都持有均值-方差有效的投资组合时,市场组合才是有效的。