Storage chip, optical stocks fell in overnight trading. DRAM down nearly 6%; SanDisk down over 4%; Western Digital down over 3%.

Corning down nearly 3%; AAOI, Coherent, Astera Labs, Lumen Technologies, Lumentum down around 2%.

South Korean-related ETFs sank in overnight trading. Direxion Daily MSCI South Korea Bull 3x Shares plunged 13.7%; iShares MSCI South Korea ETF, Franklin FTSE South Korea ETF down over 4%.