Direxion Daily Semiconductors Bull 3x Shares (SOXL) tumbled 5.19% during Thursday's trading session, extending pre-market losses as a wave of selling swept through the semiconductor and memory-chip sectors. The leveraged ETF, which aims to deliver three times the daily performance of the ICE Semiconductor Index, bore the brunt of the sector-wide decline.

The rout was triggered by disappointing sales targets from storage giants Western Digital and SanDisk, which sent their shares sharply lower in overnight trading. Western Digital fell as much as 20.8% after warning of a deeper memory-market downturn, while SanDisk slid nearly 10%. The weakness spread to other chip names, with SK Hynix dropping over 4%, and Micron and UMC each retreating around 3%. The selling pressure was further fueled by Micron's cautious demand commentary, pointing to pushed-out data-center orders and fresh concerns about an inventory glut.

Broader market sentiment also soured as analysts flagged the semiconductor sector's historical August-to-October seasonal weakness, with mean-reversion pressures building. The combination of these headwinds, amplified by SOXL's 3x leveraged structure, led to the sharp intraday decline, as traders rotated out of high-growth technology stocks amid heightened volatility.