Seoul: South Korea has announced the implementation of 24-hour weekday foreign exchange trading, a significant step in its financial modernization efforts. This reform, effective from Monday, aims to address a long-standing vulnerability in the country's foreign exchange system and align it with international standards.

According to Yonhap News Agency, the decision to keep the FX market open around the clock is a response to the influence of offshore non-deliverable forward (NDF) markets in London, New York, and Singapore, which have traditionally dictated the opening price for domestic markets. Approximately 80 percent of won-forward trading occurred in these offshore markets last year, a stark contrast to the global average of 21 percent. This imbalance has prompted South Korea to adopt continuous trading to better absorb overnight developments and provide foreign investors with easier access to the won.

The reform is also part of South Korea's broader ambition to attract global capital and meet the criteria for inclusion in the MSCI Developed Markets Index. However, the decision comes at a challenging time, as the won remains under significant pressure. The won-dollar exchange rate has been at its highest sustained level since the Asian financial crisis, influenced by foreign equity outflows, increased overseas investment, and expectations of higher US interest rates.

While longer trading hours are expected to correct market distortions, they do not inherently reverse these economic pressures. The risk of volatility is particularly pronounced during late-night trading when liquidity is thin, making the market susceptible to disproportionate price swings from modest transactions or unexpected news.

The reform poses additional challenges for small and medium-sized enterprises (SMEs), which may not have the resources to monitor currency movements continuously. This underscores the importance of vigilant supervision and real-time monitoring to detect abnormal price movements and speculative activity before they lead to instability.

To support this initiative, South Korea must also bolster its broader financial defenses, such as enhancing reserves and establishing more robust international liquidity arrangements, including currency swap agreements. These measures would reinforce market confidence during periods of stress.

Ultimately, sustainable stability in the exchange rate will rely on policies that enhance productivity, encourage investment, and improve labor market flexibility. While extending trading hours is a modernizing step, it is the country's economic fundamentals that will determine whether investors maintain their confidence in the won, irrespective of the time of day.