[Deep Dive] Historic KOSPI Plunge: Fallout from Missed MSCI Inclusion

Historic KOSPI Plunge: Fallout from Missed MSCI Developed Market Inclusion

Immediately following the announcement of the Morgan Stanley Capital International (MSCI) Annual Market Classification Review on June 23, 2026 (local time), the South Korean stock market experienced a massive shock. The KOSPI market closed down 9.99% at 8,203.84 compared to the previous trading day, marking an extraordinary decline. This historic KOSPI plunge is analyzed as the result of a sudden concentration of disappointment-driven selling by global investors. Market participants had anticipated that inclusion in the Developed Market (DM) watchlist would resolve the "Korea Discount" and attract large-scale passive capital. However, as the inclusion failed once again, investor sentiment rapidly contracted and shifted into massive sell-offs.

Foreign Exchange Accessibility and Short-Selling Regulatory Burdens

MSCI noted that despite continuous institutional improvement efforts in the capital market by South Korean authorities, fundamental obstacles remain prevalent from the perspective of global investors. Issues with foreign exchange market accessibility were highlighted as a major negative factor. The structural reliance on Non-Deliverable Forwards (NDFs) and the inability to physically deliver the Korean Won offshore continue to act as constraints. Furthermore, MSCI assessed that despite the extension of FX trading hours, a lack of liquidity makes it difficult to guarantee foreign exchange operational flexibility for index fund managers.

Additionally, the new market surveillance regulatory framework introduced alongside the resumption of short-selling last year was mentioned as a core reason for the exclusion, acting as a substantial operational burden for investors. Global investment capital strongly tends to avoid regulatory uncertainty and the operational constraints accompanied by excessive surveillance, and these elements are hindering positive evaluations of the Korean market.

Future Outlook and Policy Direction

The Ministry of Economy and Finance and the Financial Services Commission acknowledged the MSCI evaluation outcome and issued an official statement committing to unwaveringly push forward with foreign exchange and capital market reforms. The authorities expect that if the 24-hour foreign exchange trading system, which will be fully implemented starting in July, and the future offshore Korean Won settlement network stabilize successfully, evaluations from global investors will improve. Although downward pressure on the index and an outflow of funds—centered on foreign investors—acted inevitably in the short term, the market is closely watching whether trust based on fundamentals can be restored once the structural institutional refinements fully settle into the market.