The Tradr 2X Long SNDK Daily ETF (SNXX) experienced a significant post-market plunge of 5.14%, reflecting heightened investor concerns about its underlying asset, SanDisk Corp. This leveraged ETF, which aims to deliver twice the daily performance of SanDisk stock, moved sharply lower in after-hours trading on Friday.

The decline comes amid growing Wall Street scrutiny of memory chip stocks like SanDisk, which have seen spectacular gains but now face valuation compression and cyclical risk warnings. Despite SanDisk's stock surging 482% year-to-date, its forward price-to-earnings ratio has plummeted from around 23 times to below 9 times, creating a valuation paradox that has investors questioning sustainability.

Market analysts point to the inherent cyclicality of memory stocks as a key concern, with historical patterns showing that shortages often lead to eventual oversupply, suppressing prices and profits. Portfolio managers have warned that "the easy money in this stock has been made" and that volatility is likely to increase, reflecting broader anxieties about whether current earnings growth has peaked despite the AI infrastructure build-out cycle driving demand.