The Roundhill Memory ETF (DRAM) experienced a significant pre-market plunge of 5.07%, reflecting sharp declines across the memory and storage chip sector during early trading hours.

The sell-off comes amid broader headwinds for memory chip stocks, including Warren Buffett's warning about rampant speculation in the AI theme and analyst concerns about resistance to DRAM price increases. GF Securities recently lowered its forecast for third-quarter DRAM price growth, citing strong customer pushback against hikes approaching 30%, which has eroded market confidence in the sustainability of high memory prices.

This sector-wide decline follows a period of significant volatility for memory shares, with negative signals abruptly weighing on the AI-driven rally seen earlier in the week. The memory chip sector has been under pressure from concerns about supply expansion and risks of specification downgrades on the demand side, creating uncertainty about the durability of the current pricing cycle.