Buffett masters value investing by identifying undervalued companies with solid fundamentals and holding them long-term. He evaluates companies using metrics like cash flow and equity while focusing on sustainable growth potential.

Buffett is known for his long-term investment horizon and aversion to short-term speculation. He remains true to his principles even in volatile markets and uses market downturns to expand positions in undervalued companies.

Buffett seeks companies with a 'moat' - a sustainable competitive advantage that protects them from competition. This can be through strong branding, unique products, or low production costs.