Although Berkshire Hathaway (NYSE:BRK-B) has compiled the single best long-run track record in modern markets, the man who built it spends most of his shareholder letters telling you not to try this at home. On Wall Street, that contradiction has hardened into one of investing’s most durable patterns. From 1965 to 2025, Berkshire posted a ... Warren Buffett’s Berkshire Delivered a 39,000x Return Since 1965. He Still Tells Most Investors to Buy Index Funds Instead.