The memory chip sector experienced a significant sell-off in the pre-market session, with the DRAM ETF proxy down over 9%. The primary catalyst was the second-quarter earnings report from South Korean memory giant SK Hynix. Despite reporting a 557% surge in operating profit and record revenue, the results fell short of analysts' consensus estimates. This disappointment triggered a sharp decline in Asian semiconductor stocks, with the sentiment carrying over to U.S. markets and impacting related companies.