South Korea’s stock market experienced a dramatic downturn on **October 30, 2023**, with the benchmark **KOSPI index** falling by **10.8%** by the end of the trading day. This decline was triggered by significant drops in two major technology stocks: **Samsung Electronics**, which decreased by **13.3%**, and **SK Hynix**, which tumbled by **14.7%**. Together, these companies represent over half of the KOSPI’s total market value, indicating their outsized influence on the market.
The repercussions of this sell-off extended beyond South Korea, affecting American semiconductor stocks as well. **Micron Technology Corporation** declined by more than **8%**, while **SanDisk Corporation** dropped over **14%**. The influence of Samsung and SK Hynix on the global memory-chip sector underscores the interconnectedness of technology markets worldwide.
In the U.S., major tech companies are also about to report earnings, with **Meta Platforms** and **Microsoft** announcing results on **October 31**, followed by **Amazon** and **Apple** on **November 1**. These four companies alone constitute nearly **18%** of the S&P 500, and their performance could significantly impact the broader market.
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