On January 27, 2026, shares of Hyundai Motor Co., a significant South Korean carmaker, saw a significant decline when U.S. President Donald Trump threatened to increase tariffs on imported South Korean goods, such as cars and medications, from 15% to 25%. Even as South Korea hurried to react to the unexpected action, the statement shook markets and reignited trade tensions between the United States and its major economic partner. According to Trump’s comments on social media, the tariff threat resulted from South Korea’s lawmakers delaying approval of a comprehensive trade and investment agreement reached with Washington last year.
In early trading, Hyundai’s stock fell as much as 4.8 percent, while sister company Kia Corp dropped around 4.45 percent and parts maker Hyundai Mobis fell about 5.37 percent. The sharp sell-off reflected investor concern about the potential cost impact of higher duties on exports, particularly to the United States, which accounts for a substantial share of sales for South Korean automakers. Reuters reported that Hyundai and related stocks moved sharply lower before later stabilising somewhat during the session.
Tariff Threat and Trade Deal Backdrop:
The South Korean National Assembly’s failure to implement the trade framework decided upon in July 2025, which included a pledge to bind U.S. tariffs on Korean exports, especially autos, at 15%, was the basis for President Trump’s threat to raise tariffs. Trump claimed on social media that this failure warranted a return to 25 percent taxes, which would drastically raise the price of Korean automakers exporting to the United States. In order to increase competitiveness against automobiles from other nations, tariffs on U.S. imports of Korean-made cars and auto parts were bargained down from a previous level of 25% to 15% under the agreement reached between the two countries last year. On November 1, 2025, the 15% rate went into force. As long as South Korea fulfilled its legal responsibilities, it was expected to stay steady.
The U.S. export market remains critical for South Korean automakers. Auto exports to the United States in 2025 totalled about $30.2 billion, accounting for roughly 25 percent of all U.S.-bound shipments from South Korea, even though that figure was down from the previous year. A tariff increase would make Korean-built cars more expensive in a highly competitive market and could dampen demand at a time when global auto industries are already facing cost headwinds and supply chain pressures. South Korean officials said they had not received formal notice of the tariff hike and were seeking to clarify the situation with U.S. counterparts. Plans were underway for government representatives to engage in consultations in Washington in an effort to address concerns and work toward a diplomatic resolution.
Market Reaction and Broader Economic Concerns:
The initial market response to Trump’s announcement saw Hyundai and other automaker shares slide sharply. Hyundai’s share price decline in early trading as much as 4.8 percent reflected investor anxiety about the financial implications of higher tariffs, as vehicle manufacturers could face increased costs that erode profit margins or force them to raise prices on key markets like the U.S. Kia’s share price also slipped about 4.45 percent, while Hyundai Mobis, which supplies parts to both Hyundai and Kia, saw its stock fall about 5.37 percent in pre-market trading. Analysts noted that the tariff threat, even if not immediately enacted, has injected volatility and uncertainty into auto stocks and broader market sentiment. However, markets were not uniformly bearish on South Korean equities. According to Reuters data, South Korean auto stocks later rebounded somewhat, with Hyundai ending higher by midday trade after earlier losses. Overall, the KOSPI benchmark index also managed to gain ground, indicating resilience in broader investor sentiment despite trade tensions.
Currency markets also reacted to the tariff threat. The South Korean won weakened, trading below 1,450 per U.S. dollar at one point, showing pressure consistent with risk-off sentiment among currency traders. A softer won can complicate inflation and import costs but may offer some benefit to exporters by making them relatively more competitive abroad. Concerns about tariff impacts extend beyond the auto sector. Trump’s plans would also raise levies on pharmaceuticals and lumber, sectors for which South Korea exports significant volumes to the United States. Higher duties in these industries could raise input costs, dampen export growth, and affect long-term investment decisions by multinational companies.
Uncertain Trajectory for Trade and Stocks:
With tariff rhetoric mounting, both South Korean policymakers and business leaders face negotiations that could shape trade flows, investment commitments and competitive positioning for years to come. Should tariffs be formally enacted, automakers could face higher costs and strategic adjustments in production and pricing strategies. For now, markets remain sensitive to each political development, and share prices may fluctuate as investors weigh the likelihood and potential impact of tariff implementation.
Hyundai and other significant exporters will keep assessing their choices as diplomatic talks and legislative procedures move forward. These possibilities range from advocating for trade clarity to investigating operational changes that minimize any tariff effects. Industry observers predict that the outcome of this most recent tariff threat would affect not only South Korean automakers but also international trade standards involving important industrial sectors and associated economies.
