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South Korean Markets Reel as Tech Jitters Go Global

  • Nishadil
  • November 21, 2025
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  • 3 minutes read
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South Korean Markets Reel as Tech Jitters Go Global

Well, what a rough start it was for South Korean markets! The main KOSPI index really took a tumble today, shedding over 3% of its value in what felt like a rather dramatic session. It seems the ripple effects from a pretty tough week for tech stocks across the Pacific, particularly in the U.S., finally hit home with quite a jolt.

By the time the trading day wrapped up, the benchmark KOSPI had plummeted a significant 3.14%, settling at 2,604.58. Now, if you're keeping score, that's actually its steepest daily percentage fall we've seen since way back in January of 2023. To put it simply, investors certainly felt the pinch, with an eye-watering sum of approximately $70 billion in market value just vanishing into thin air. Ouch!

Leading this rather unwelcome descent were, unsurprisingly, the heavyweights of the chip industry. Samsung Electronics, that titan of technology, saw its shares dip a hefty 3.56%. Not far behind was SK Hynix, another semiconductor giant, which slipped by 2.45%. It’s pretty clear they were tracking the fortunes (or misfortunes, in this case) of their American counterparts, especially after Nvidia, that darling of the AI world, endured a more than 10% drop on Friday. When a company like Nvidia sneezes, it seems the global tech market catches a cold, and South Korea's chipmakers are right there on the front lines.

But the tech blues weren't confined to just the chip sector. Even the big platform players felt the squeeze. Naver, a household name in South Korea, experienced a 2.41% drop, and Kakao, another digital giant, wasn't spared either, falling by 3.65%. It truly paints a picture of widespread concern across the technology landscape.

And who was doing the selling, you might ask? Well, it appears foreign investors decided to hit the 'exit' button, offloading a substantial 926.3 billion won worth of shares. Their selling spree definitely added to the downward pressure on the market. Meanwhile, the South Korean won also showed signs of weakness, depreciating by 0.58% against the dollar, reaching 1,385.9 per greenback. A weakening currency can sometimes signal investor nervousness, among other things.

It wasn't just equities feeling the heat, either. Even the bond market reacted. Yields on the benchmark 3-year treasury bonds edged up by 6.1 basis points, settling at 3.528%, while the 10-year bond yields climbed 5.4 basis points to 3.639%. Often, when bond yields climb, it suggests investors are bracing for potentially higher interest rates or are seeking greater compensation for holding debt, which can sometimes divert money away from stocks.

All of this, of course, isn't happening in a vacuum. The shadow of the U.S. Federal Reserve's rather hawkish stance on interest rates, coupled with ongoing concerns about just how highly valued some of these tech stocks truly are, continues to loom large over global markets. It seems that until there's clearer guidance or a shift in sentiment, investors are likely to remain cautious, keeping a very close eye on every twitch and turn, especially when it comes to the volatile world of technology.

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