An updated edition of the November 12, 2025 article.In the business world, the concept of a wide moat refers to companies with strong, durable competitive advantages that protect them from rivals, much like a moat defends a castle. First popularized by Warren Buffett, this strategy emphasizes investing in businesses that can sustain superior profitability over the long term due to their unique positioning, strong brand loyalty, cost advantages, network effects or regulatory barriers. Among the companies tha ...