Seagate Technology (STX): A Case Study in Short-Selling Dynamics and Stock Performance

Author:

S3 Research Team

May 28, 2025

Seagate Technology's stock experienced significant volatility due to short-selling activities. After an initial drop driven by weak fundamentals, the stock rebounded sharply. Short sellers missed the opportunity to lock in gains, leading to potential losses as the stock continues to rise.

Seagate Technology has become a compelling example of the risks and rewards of short-selling amid volatile market movements.

In February, short interest in the stock doubled, signaling a bearish outlook. That sentiment proved prescient, as the stock dropped 30% across March and April. Short sellers correctly anticipated the downturn.

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However, what followed caught many by surprise: Seagate rallied sharply, gaining 50% and returning to its previous level. Notably, short sellers, as a whole, held onto their positions, missing the opportunity to lock in gains at the bottom.

The initial sell-off was driven by a combination of weak fundamentals: disappointing earnings, analyst downgrades, contracting profit margins, a declining return on capital, and broader macroeconomic pressures.

Conversely, the rebound was powered by an earnings surprise, renewed analyst optimism, increased demand tied to AI growth, and new strategic partnerships, most notably with Nvidia.

While short sellers were initially right, their inability to adjust during the rebound meant forfeiting all their substantial profits.

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Today, Seagate remains heavily shorted, with 8% of the float still held short. As the stock continues its upward momentum, short sellers are facing mounting losses, raising the likelihood of a short squeeze. The blue line shows the cumulative collective P&L of the short community.

S3’s Squeeze Score for Seagate is currently 77, having remained above 70 for nearly a month. A squeeze may have already begun in early May when short interest declined from 9% to 8% amid a 10% rally. That said, short interest has since clawed back about half of that reduction.

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Seagate Technology's stock movements highlight the complexities of short-selling. While initial bearish sentiment was accurate, the subsequent rebound caught many by surprise. Short sellers now face mounting losses, emphasizing the importance of timely adjustments in trading strategies.


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The information herein (some of which has been obtained from third party sources without verification) is believed by S3 Partners, LLC (“S3 Partners”) to be reliable and accurate. Neither S3 Partners nor any of its affiliates makes any representation as to the accuracy or completeness of the information herein or accepts liability arising from its use. Prior to making any decisions based on the information herein, you should determine, without reliance upon S3 Partners, the economic risks, and merits, as well as the legal, tax, accounting, and investment consequences, of such decisions.

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