Benjamin Graham
Benjamin Graham's timeless value investing principles teach you how to separate price from value and ignore the emotional swings of the stock market.
Value investing focuses on buying assets for less than their intrinsic value to create a margin of safety against errors and market downturns.
The allegorical figure of Mr. Market represents the emotional and unpredictable nature of stock prices, which investors should exploit rather than follow.
Defensive investors should maintain a simple, balanced portfolio of high-grade bonds and common stocks to minimize required oversight.