What the Masters Would Say
The urge to take profits on a winning stock is one of the most natural feelings in investing -- you want to lock in the gains and protect what you have earned. But this instinct, while psychologically comforting, is one of the greatest wealth destroyers in stock market history.
Philip Fisher, one of the greatest growth investors of all time, argued that if you bought correctly, the right time to sell a great business is "almost never." He held his best positions for decades and generated returns that dwarfed any trading strategy. Warren Buffett agrees wholeheartedly: his favorite holding period is forever. The reason is simple math -- compounding requires time, and every time you sell a winner, you reset the compounding clock and generate a tax event that permanently reduces your capital.
Peter Lynch adds a crucial observation: investors who trim their best stocks and hold their worst ones end up with a portfolio of losers. He called it "pulling the flowers and watering the weeds." The data is overwhelming: the greatest wealth in stock market history was created by investors who held exceptional businesses for decades, not by traders who took profits after 50% or 100% gains.
Charlie Munger puts it in mathematical terms: the first rule of compounding is to never interrupt it unnecessarily. A stock that compounds at 15% annually turns $10,000 into $660,000 over 30 years. But if you sell every time it doubles, pay taxes, and reinvest, you dramatically reduce the final outcome because taxes create drag on every transaction.
Howard Marks offers important context: the difficulty of selling is that you must be right twice -- once about when to sell and once about what to buy next. If you sell a great compounder and reinvest in something inferior, you have made two mistakes in one transaction.
Here is a disciplined framework for when to actually sell a winning stock:
Your Action Plan
2. Sell when the valuation stretches absurdly beyond any reasonable growth scenario -- not just expensive, but genuinely irrational. This is rare for truly great businesses.
3. Sell when you discover a dramatically better opportunity and need to reallocate capital. The bar here should be very high.
4. Never sell just because a stock has risen a certain percentage -- that is arbitrary and ignores business quality.
5. If the urge to sell is strong, consider trimming 10-20% to satisfy the psychological need while letting the bulk of your position continue compounding.
The Bottom Line
Let your winners run -- the greatest investment gains come from the positions you never sold.
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Principles That Apply
"If the job has been correctly done when a common stock is purchased, the time to sell it is almost never."Read Full Principle →
"Our favorite holding period is forever. If you aren't willing to own a stock for 10 years, don't even think about owning it for 10 minutes."Read Full Principle →
"The key to making money in stocks is not to get scared out of them."Read Full Principle →
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