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The Cardinal Sin of Delayed Decisions | Durham News

Warren Buffett just named the “cardinal sin” of investing: delaying action on mistakes — a habit Charlie Munger called “thumb-sucking.” Buffett’s own Berkshire Hathaway missed Google’s rise for years, only jumping in in 2025, costing them massive gains. Behavioral economists call this the disposition effect — selling winners too fast while clinging to losers out of emotional pain. The fix? Ask yourself: if I knew this today, would I buy this stock at its current price? If not, it’s time to act — every dollar stuck in a losing play is money not working for you. Delaying tough calls only lets…

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