Buffett's core investing rule comes from his mentor Benjamin Graham: "Price is what you pay; value is what you get." Here's why this single idea built his fortune.
Berkshire Hathaway (BRK.A) CEO Warren Buffett’s 90/10 rule, which allocates 90% to S&P 500 index funds, was designed for his wife’s specific circumstances and a very long-term horizon. Buffett himself ...