正如几何学最自然的起点是数学点，在观察和自然历史中采用同样的方法也最真实、简单且富有教益。

The bond market is the most important market in the world.

Sustainability isn't an option; it's a responsibility we owe to future generations.

The quantum world is not deterministic in the classical sense, nor is it purely random - it's something in between.

"The past is never dead; it’s not even past."

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。