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。
Communicate everything you possibly can to your partners. The more they know, the more they'll understand. The more they understand, the more they'll care. Once they care, there's no stopping them.
生命本身就是最美的童话。
Beauty is not about perfection, it's about authenticity and confidence.