On the morning of July 28, the Korea Composite Stock Price Index (KOSPI) commenced trading on a significantly bearish note, with its value plummeting by over 8%. This sharp decline activated the Level 1 circuit breaker mechanism, leading to a 20-minute suspension of trading activities. Upon resumption, the downward trend intensified, culminating in a staggering 10.84% drop, with the index closing at 6,023.66 points. This represents the most substantial single-day decline since March 4, 1998. As pivotal constituents of the market's benchmark, Samsung Electronics and SK Hynix witnessed precipitous falls, propelling the overall market into a downward spiral. Specifically, SK Hynix's stock tumbled by more than 10%, while Samsung Electronics experienced a decline exceeding 8%. This wave of sharp declines mirrored the widespread sell-off in U.S. technology and semiconductor stocks, as investors started to cast doubts on the revenue-generating potential of massive AI investments amounting to hundreds of billions of dollars.