The Roundhill Memory ETF (DRAM) experienced a pre-market plunge of 6.28%, reflecting a significant downturn for the memory chip sector.

The sharp decline was primarily triggered by SK Hynix's formal announcement of a five-year plan to double its wafer capacity across all product lines, including high-bandwidth memory (HBM), DDR5, and 3D NAND. This signal of massive future supply additions prompted investors to take profits, especially given the sector's overheated sentiment following a substantial year-to-date rally.

Broader industry concerns also contributed to the negative sentiment, with analysts cautioning about the sustainability of the current memory super cycle. The extreme concentration of demand from artificial intelligence (AI) data centers is creating critical supply-demand imbalances that could eventually undermine broader market health.