Timing the Sale of Profitable Stocks: Insights from a $40 Million Experience

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Archie Karas, a Greek immigrant in Los Angeles, turned $50 into a $40 million fortune through poker and gambling from December 1992 to early 1995. However, by 1996, he lost it all due to overconfidence in his winning streak. This serves as a cautionary tale for investors who, after significant gains, may ignore warning signs and refuse to sell.

Avoiding the same fate, Louis Navellier emphasizes the importance of data-driven decision-making in investing. He cites the decline of Lululemon Athletica Inc. (LULU) as a case study, where he sold shares for a 156% gain before their value plummeted significantly in the following years. As of 2026, LULU shares are down approximately 47% year-to-date.

Navellier’s ongoing analysis through his Stock Grader system highlights the need to stay attuned to changing market conditions, especially as we approach 2027. His approach underscores that just because a stock was a past winner, it doesn’t guarantee future success.

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