S. Korean Won Falls to 17-Year Low

South Korea's government has pledged to take firm action against illegal foreign-exchange trading and speculative activity after the Korean won plunged to its weakest level in 17 years, intensifying concerns over financial market stability.

Finance Minister Koo Yun-cheol made the commitment during an emergency meeting on financial market conditions, according to a statement from the Ministry of Economy and Finance, as authorities seek to contain heightened volatility in currency markets.

The move comes after the won weakened beyond 1,550 per U.S. dollar late Friday, marking its lowest level since 2009 and highlighting mounting pressure on Asia's fourth-largest economy amid ongoing global market disruptions.

Speaking after the meeting, Koo said financial authorities would not tolerate excessive fluctuations in the exchange rate or one-sided market movements driven by speculative trading activity.

He stressed that maintaining currency stability remains a key priority for policymakers as external uncertainties continue to weigh on investor sentiment and capital flows.

The sharp depreciation of the won has increased concerns over imported inflation, corporate financing costs, and broader financial-market stability, particularly as global investors reassess risk exposure amid geopolitical and economic uncertainty.

In a separate development, South Korean President Lee Jae-myung appointed economist Shin Hyun-song as the next governor of the country's central bank.

Shin is widely recognized in international financial circles for accurately warning about vulnerabilities ahead of the 2008 global financial crisis. He previously served as Head of Research and Economic Adviser at the Bank for International Settlements.

The appointment is viewed as part of a broader strategy to address rising debt levels, support economic growth, and strengthen monetary policy management at a time of heightened financial volatility.

Shin will succeed incumbent central bank governor Rhee Chang-yong, whose term is scheduled to expire on April 20, according to the presidential office.

The won's decline comes despite strong performance in segments of South Korea's equity market earlier this year, with technology and semiconductor stocks providing support to investor sentiment.

However, escalating geopolitical tensions, energy market disruptions, and uncertainty surrounding global trade flows have increased pressure on the country's financial markets, making South Korea one of the most volatile markets in Asia in recent months.

Analysts say authorities are likely to closely monitor currency movements and liquidity conditions in the coming weeks, with potential intervention measures remaining on the table should volatility intensify further.

The government's latest warning against speculative trading signals a more proactive stance toward protecting financial stability as policymakers seek to restore confidence in the currency and shield the economy from the effects of global market turbulence.