South Korea’s stock market has been on an incredible ride in 2026, powered largely by AI excitement. The country’s main stock index, the KOSPI, surged as investors poured money into semiconductor giants like Samsung Electronics and SK Hynix.

But this week, reality hit hard.

After regulators warned investors about risky leveraged ETFs tied to chip stocks, panic selling began. The KOSPI plunged nearly 10% in a single session, triggering a temporary market halt. Many everyday Korean retail investors—nicknamed “ants” (개미) —were hit especially hard because many borrowed money to invest.
Korea’s AI boom shows both excitement and danger. AI may be the future, but even future-focused markets can overheat fast. In Korea, enthusiasm moves quickly—and sometimes crashes just as fast.

Vocabulary
● 주식 (jusik) — stock / shares
● 코스피 (koseupi) — KOSPI stock index
● 반도체 (bandoche) — semiconductor
● 개미 투자자 (gaemi tujaja) — retail investor (“ant investor”)
● 폭락 (pongnak) — sharp crash / plunge