Warren Buffett means by 'Be fearful when others are greedy, greedy when others are fearful'

Glossary of contract bridge terms

Margin of safety principle: Buy below intrinsic value

Buffett means by 'Only when the tide goes out do you discover who's been swimming naked'

Buffett's quote: "Only when the tide goes out do you discover who's been swimming naked."

Benjamin Graham's Mr. Market allegory teaches about market irrationality

Benjamin Graham's Mr. Market allegory teaches that markets can be irrational, with prices fluctuating wildly independent of intrinsic value

Overconfidence effect

Overconfidence leads to overtrading and underperformance

Endowment effect

People value owned items more than unowned ones

Modern portfolio theory

Modern Portfolio Theory (MPT) maximizes expected return for a given level of risk through diversification