An updated edition of the June 17, 2025 article. A wide moat refers to companies with lasting competitive advantages that protect them from rivals, similar to how a moat defends a castle. Made famous by Warren Buffett, this strategy targets businesses that can sustain strong long-term profitability due to factors like distinct market positions, strong brand loyalty, cost advantages, network effects and regulatory barriers. Among the companies that exemplify wide economic moats are Lam Research Corporation ( ...