South Korea's benchmark KOSPI index surged more than 2.5% on Thursday, snapping a three-day losing streak that had pushed it to a seven-week low. The bounce was driven by heavyweight chipmakers Samsung Electronics and SK Hynix, which tracked an overnight rally in US semiconductor stocks.
The move had the feel of a relief bounce after a bruising run: the KOSPI had slid for three straight sessions into a seven-week low and was down more than 20% from its late-June record peak, placing it in bear market territory. South Korea's Kospi Enters Bear Market as Tech Giants Slide.
Chipmakers Lead the Charge
Samsung Electronics rose 2.52%, while SK Hynix jumped 7.23%, making them the biggest contributors to the index's gain. The rally followed a strong session for US semiconductor stocks, with Broadcom rising 2.2% after Apple announced plans to spend more than $30 billion under a chip-supply agreement reached earlier this week. Kiwoom Securities, a South Korean brokerage, said the overnight rebound in US semiconductors drew "dip-buying" from investors looking for bargains after the recent sell-off.
Not all sectors participated in the rally. Automakers fell sharply, with Hyundai Motor down 2.49% and Kia dropping 4.59%, as investors rotated out of cyclical stocks amid ongoing macroeconomic uncertainty.
Macro Backdrop Remains Noisy
The broader market backdrop stayed turbulent. US stocks finished lower after President Donald Trump said an interim deal aimed at ending the war with Iran was "over," reigniting geopolitical tensions. That news also pushed oil prices higher, with Oil Jumps 7% After US Declares Iran Ceasefire Over, Tankers Attacked and Oil Jumps, Stocks Slide as Trump Threatens New Iran Strikes. The impact was felt across Asian markets, with Asia Markets Split as Strait of Hormuz Tensions Hit Japan and South Korea Hard.
Meanwhile, South Korean government bond yields rose alongside the weaker currency, as the won weakened to 1,507 per dollar. A weaker won typically raises import costs and can fuel inflation, but for an export-heavy economy like South Korea, it also has a silver lining.
What It Means for Investors
A sliding currency doesn't automatically spell trouble for stocks in an export-heavy market like South Korea. When the won weakens, overseas sales priced in dollars translate into more won on the income statement, which can lead investors to mark up near-term earnings expectations for big exporters such as Samsung Electronics and SK Hynix. That helps explain why the index can rise even when the currency is falling and local borrowing costs are ticking up.
The catch is concentration: on days like this, the KOSPI can trade less like a broad read on Korea's domestic demand and more like a high-sensitivity mix of global semiconductor sentiment plus the won's direction. For everyday investors, that means the index's moves may not reflect the health of the broader economy, but rather the fortunes of a few giant tech firms.
Looking ahead, investors will be watching for further developments in US chip stocks, which have been a key driver of global tech sentiment. The recent strength in semiconductors, fueled by AI demand and supply agreements like Apple's deal with Broadcom, could continue to support Korean chipmakers. However, geopolitical risks and currency volatility remain wild cards that could quickly reverse the gains.
For those with exposure to Korean stocks through ETFs or direct holdings, the key takeaway is that the market's fate is tightly tied to the semiconductor cycle and the won's direction. Diversification across sectors and regions remains a prudent approach, especially when a single industry can swing the entire index.
