
Charles Munger, Berkshire Hathaway co-founder who died in November 2023, advocated investing only in opportunities where you possess extra knowledge. He emphasized that a few well-chosen investments suffice rather than diversification. Munger promoted multi-disciplinary learning and experience as keys to identifying successful businesses. Warren Buffett credits Munger with shaping Berkshire's philosophy toward high-quality companies. Under their 60-year partnership, Berkshire averaged 20% annual gains, roughly double the S&P 500.