“Be fearful when others are greedy.  Be greedy when others are fearful.”
— Warren Buffett

Warren Buffett’s $5 billion investment in Bank of America this week epitomizes one of Mr. Buffet’s key tenets: don’t let emotions guide your investment decisions. 

Successful investors recognize that an unemotional, objective, disciplined investment approach is key to building long-term wealth.  This often includes buying at times of maximum pessimism (e.g., Mr. Buffett’s BoA purchase).