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。
世界上不知有多少贝丝,羞怯,娴静,躲在角落里,有需要时才露面,甘心情愿地为他人活着没人留心她们做出的牺牲,直到炉边的小蟋蟀,消歇了唧唧之声,芳香温煦,一去不返,只留下一片沉寂和空虚。
The future belongs to those game creators who dare to break through traditional thinking.
艺术是永恒的,生命是短暂的。
Sustainability isn't just a trend—it's our responsibility to the next generation.
I’m not perfect, but I try my best every day.