动物和人类的有目的行为。

人的行动是他们思想的最佳诠释者。

The key to successful investing is to have a clear understanding of the market, the risks involved, a disciplined approach, a long-term perspective, a strong understanding of the fundamentals, a clear understanding of the risks and rewards, and a strong understanding of the market psychology.

经济理论提供工具，但现实世界的测试会完善它们。