SanDisk Corp.'s stock plummeted 5.09% during Tuesday's intraday trading session, marking a sharp reversal from its recent strong performance. The flash memory provider's shares retreated significantly following a substantial rally in the previous session.

The downturn appears to be driven primarily by profit-taking activity after SanDisk surged 12% on Monday. That rally was triggered by news that the company would be added to the Nasdaq-100 Index, replacing software company Atlassian before the market opens on April 20. Analysts note that the stock had already gained nearly 300% year-to-date entering Tuesday's session, leading to concerns about stretched valuations and prompting investors to lock in gains.

Additional factors contributing to the decline include heightened competitive dynamics in the NAND flash memory market, where Chinese chipmaker Yangtze Memory Technologies (YMTC) plans to more than double its production capacity through new factory construction. YMTC currently holds the same market share as SanDisk in the global NAND flash market, potentially intensifying pricing pressures in the sector.