South Korea's KOSPI surged over 90% in 2026, driven by Samsung Electronics and SK Hynix as AI chip demand triggers a memory semiconductor supercycle.

South Korea's KOSPI index dropped 9% intraday as Samsung Electronics and SK Hynix led a massive sell-off triggered by AI valuation fears and US rate

South Korean technology stocks rebounded sharply on Tuesday as investors returned to AI-linked shares after a steep three-day selloff that had pushed the KOSPI down more than 15%.…