On October 3, with rising military tensions in the Middle East due to the U.S. and Israeli invasion of Iran, South Korea's KOSPI index fell over 2%, dropping below the 6100 mark. The trading results from the Korea Exchange showed that KOSPI started at a 1.26% drop, trading at 6165.15, and further dropped to a low of 6081.92 before experiencing some recovery, showing significant volatility. By 9:14 AM, it had fallen 2.32% to 6093.7, remaining under the 6100 threshold.

The volatility was also evident in individual stocks, with major companies such as Samsung Electronics and SK Hynix seeing significant declines of 4.16% and 3.77%, respectively, contributing to the overall downtrend. In contrast, U.S. stock markets had closed the previous day with mixed results, as fears of economic repercussions from the Iran conflict initially pushed prices down, but investor sentiment later improved, leading to modest gains for the S&P 500 and Nasdaq.

Meanwhile, commodity markets were affected as well, with crude oil prices for West Texas Intermediate rising by 6.3% to $71.23 per barrel, and gold futures increasing by 1.2% to $5311.6 per ounce. The Korean won also weakened against the dollar, with an increase of 22.6 won, starting at 1462.3 won on the day.