Should You Sell a Stock After It Doubles?
It's tempting to cash out when a stock doubles. Sometimes that's smart — usually it isn't. Here is a simple framework for selling a winner without regret.
Few things feel as good as watching a stock you bought double in value. And few things tempt investors into mistakes as reliably. "Take profits!" feels responsible. But selling your winners early is one of the most expensive habits in investing — the biggest fortunes come from holding great companies for years, not from booking a quick 100%.
So when should you sell? Use a simple three-question framework.
The three questions
1. Has the reason you bought it broken? You bought the company for a reason — strong growth, a widening moat, great management. Is that reason still true? If the story is intact and just the price went up, a double is not a reason to sell. If the story is broken — growth has stalled, the moat is cracking — that is a reason to sell regardless of the price.
2. Is it now wildly overvalued? A doubling is fine if profits roughly doubled too. But if the price ran far ahead of the business — a sky-high P/E with no growth to justify it — the stock may be priced for perfection. That can justify trimming (selling part), not necessarily selling it all.
3. Has it become too big a slice of your portfolio? Sometimes a winner grows so much that it is now 40% of your money. Even if you love the company, that is a lot riding on one name. Selling a portion to rebalance is about managing risk, not doubting the business.
The default answer
Notice the pattern: in every case, the default is to keep holding. You sell for a specific reason — a broken thesis, an extreme valuation, or a position that has grown too large — not because the number on the screen looks big.
A useful reframe: imagine you held no shares today. Would you buy it now at this price? If yes, holding is just buying again. If no, you have your reason.
This is education, not investment advice.