South Korea has taken a pivotal step in its currency liberalization, though the timing is delicate.
The Korean won will officially commence round-the-clock trading starting July 6th, marking the most significant relaxation of domestic currency controls in decades and a core initiative by Seoul to secure an upgrade from MSCI to developed market status.
However, this historic shift coincides with a period of pressure on the won, with the exchange rate having fallen to a 17-year low and depreciating over 6% year-to-date.
Meanwhile, the South Korean stock market, exports, and current account surplus have all shown strong performance, drawing widespread attention to the divergence between the exchange rate trend and underlying economic fundamentals.
Seoul has repeatedly warned against speculative trading, and regulators conducted special inspections of major banks' market activities this year, urging exporters to convert foreign exchange earnings to stabilize the won, with limited effect.
For the market, the 24-hour trading regime implies narrower arbitrage opportunities, reduced influence from the offshore non-deliverable forward (NDF) market on exchange rate movements, and a potential decrease in the cost of holding won, though the risk of increased short-term volatility is equally significant.
A Historical Turning Point: From the 1997 Crisis to Major Liberalization
Behind this foreign exchange reform lies nearly three decades of complex history between South Korea and its currency controls.
During the 1997 Asian financial crisis, the won lost more than half its value within two months, pushing the country to the brink of sovereign default. Lew Changbeom, a former forex trader at Bank of America and JPMorgan, recalls that the won's daily declines sometimes exceeded 10%, with volatility even surpassing 20%, leading to genuine fears of national collapse.
The core lesson from that crisis was the imperative to never run short of US dollars.
Subsequently, South Korea massively rebuilt its foreign exchange reserves. During the crisis, reserves were barely sufficient for four to five days of import needs, and controls on the won were tightened: trading hours were restricted, settlements were required to remain onshore, and transactions had to go through designated banks.
Today, South Korea has accumulated one of the world's largest foreign exchange reserves, providing substantial market buffer capacity.
Currently, the won is traded for 17 hours daily, with the market closed between 2 a.m. and 9 a.m. Seoul time.
This gap overlaps with the US trading session, forcing global investors to manage currency risk via NDFs while holding Korean assets, thereby spawning significant arbitrage activity exploiting the price differential between onshore and offshore markets and exacerbating the market volatility that regulators have been wary of.
Economic Restructuring: South Korea as a Net Capital Exporter
The deeper logic driving this liberalization stems from a fundamental shift in South Korea's economic structure.
For decades, robust exports and persistent current account surpluses provided natural support for the won, with exporters repatriating foreign exchange earnings and foreign investors continuously buying Korean assets, creating a virtuous cycle. However, this mechanism is weakening.
South Korea recorded a current account surplus of $102.7 billion in the first four months of this year, but a large portion of these funds did not flow back into the domestic market: outward foreign direct investment and residents' purchases of foreign securities resulted in outflows exceeding $60 billion, while foreign investors were net sellers of approximately $43.6 billion in Korean stocks.
In other words, South Korea is increasingly exhibiting characteristics of a net capital exporter, with earned dollars being deployed overseas rather than recycled back home.
The National Pension Service continues to increase its overseas allocations, involving selling won for dollars; concerns over US-South Korea trade negotiations also add pressure, with Seoul having pledged $350 billion in US investments.
This structural change makes the policy logic behind restricting won trading hours increasingly untenable. Claire Huang, Senior Asia Macro Strategist at AXA Investment Managers, stated that extending trading hours is a necessary step to enhance the won's presence in global financial markets, and to make won trading as accessible as G10 currencies, ensuring liquidity during extended hours is essential.
The Sejong 'Monitoring Room': A Policy Nerve Center Under New Pressure
Deep within the Sejong Government Complex, about two hours from Seoul, lies a room known as "the box," serving as the nerve center for monitoring pressure on South Korea's foreign exchange market.
According to sources cited by Bloomberg, in this room marked "No Entry," finance ministry officials monitor screens around the clock, closely tracking every price movement and volume change in the won, ready to assess whether market intervention is necessary.
In preparation for the 24-hour trading starting July 6th, the team has intensified preparations—improving catering standards, adding an official, and even potentially replacing makeshift folding cots with proper beds.
However, after July 6th, the difficulty of work in "the box" will increase significantly. Round-the-clock trading means authorities cannot rest when the market is closed, and intervention windows will be more rigorously tested. Seungheon Lee, former senior deputy governor of the Bank of Korea, stated that foreign exchange authorities should move away from a mindset of strict market control and must eliminate institutional barriers to trading to achieve substantive results.
Market Preparations: Banks Expand Teams, Investors Seek Opportunities
In anticipation of the 24-hour trading era, major financial institutions are accelerating their preparations.
One of South Korea's largest commercial banks, Woori Bank, secured a license in the UK at the end of May to support won-related business outside Korean market hours; several major banks have already expanded or are expanding their foreign exchange trading teams in London and Seoul.
On the investor side, market participants are also sensing new trading opportunities.
Ed Al-Hussainy, a portfolio manager at Columbia Threadneedle in New York, noted that significant capital will likely attempt to enter this market using carry trade strategies.
In the long term, analysts generally believe 24-hour trading will help smooth exchange rate movements and reduce structural friction, though the risk of increased volatility in the short term remains.
Bumki Son, an economist at Barclays, pointed out that greater market openness may accompany higher volatility, a fact policymakers should remember.
Ali Bora Yigitbasioglu, Senior Investment Manager for Emerging Market Fixed Income at Pictet Asset Management, holds a more optimistic view, believing the institutional reform itself sends a positive signal, demonstrating South Korea's commitment to international standards. While directional exposure still depends on the semiconductor export cycle, eliminating these operational friction points will make holding Korean assets structurally more attractive.
South Korea's Vice Finance Minister Moon Jisung characterized this reform as a strategic deployment beyond regulatory changes. In a media interview, he stated that this is not merely a regulatory reform; it is key infrastructure to propel South Korea's capital markets to the level of accessibility and convenience expected of a developed market.
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