David Tepper didn’t have to call the exact top in Sandisk Corp (NASDAQ:SNDK) to make one of the most disciplined portfolio moves of the quarter. Appaloosa Management‘s latest 13F shows the billionaire investor completely exited the memory-chip maker during a quarter in which the stock delivered its strongest rally on record.
Since then, SanDisk shares have fallen more than 30% from their late-June peak, highlighting the challenge of knowing when to take profits after a parabolic run.
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A Historic Quarter for SanDisk
Appaloosa’s second-quarter 13F filing shows the fund exited its entire stake of 281,250 SanDisk shares after holding the position at the end of the first quarter. The filing, however, only reflects holdings as of June 30 and does not disclose when during the quarter the shares were sold.
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That distinction matters because SanDisk’s second quarter was unlike anything investors had seen before. Fueled by surging demand for AI-related memory chips, the stock climbed more than 200% during the quarter, making it the company’s strongest quarterly performance on record. Shares went on to hit an all-time high of roughly $2,350 in late June before reversing course.
While it’s impossible to know whether Tepper sold near the beginning, middle or end of the rally, one fact is clear: Appaloosa had fully exited before the stock’s subsequent correction unfolded.
Why the Timing Matters
It’s tempting to view the trade as a perfectly timed exit. But that’s a conclusion investors should resist.
A 13F filing provides only a quarter-end snapshot of a hedge fund’s U.S. equity holdings, not a transaction log. Tepper could have sold weeks before SanDisk reached its high, or much closer to it. The filing simply doesn’t say.
Even so, the trade illustrates something equally important. Professional investors often focus less on maximizing every last dollar of upside than on managing risk after extraordinary gains. Selling into strength—even if it means leaving some upside on the table—is often preferable to trying to identify the exact peak.
That philosophy also appears elsewhere in Appaloosa’s portfolio. During the same quarter, the fund reduced its Micron Technology, Inc. (NASDAQ:MU) position by about 41% rather than exiting entirely, suggesting Tepper was selectively trimming exposure to a sector that had already enjoyed exceptional gains.
The Bigger Lesson for Investors
SanDisk’s more than 30% pullback doesn’t prove Tepper foresaw the decline, nor does it validate every aspect of the trade. What it does underscore is how quickly sentiment can reverse after a stock experiences a near-vertical ascent.
For investors, the key takeaway isn’t to imitate Tepper’s timing but to understand his discipline. When a stock delivers one of the strongest rallies in its history, the harder question isn’t whether the business remains attractive—it’s whether the market has already priced in much of that optimism.
That’s the question SanDisk investors will continue to wrestle with as the company seeks to justify one of the most remarkable rallies the semiconductor sector has seen in years.
Photo Courtesy: TK Kurikawa on Shutterstock.com
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