[South Korean Exchange Activates KOSPI Circuit Breaker Due to 5% Drop in KOSPI 200 Futures] Deep Tide TechFlow reports that on May 18, the South Korean exchange activated the KOSPI circuit breaker due to a 5% drop in KOSPI 200 futures, halting programmatic trading for 5 minutes. Samsung Electronics fell 3%, and SK Hynix is currently down 2.5%. (Jin10)