FTSE Russell has officially confirmed the inclusion of Korean Treasury Bonds (KTBs) into its prestigious World Government Bond Index (WGBI).
This decision marks a significant milestone for Korea's financial markets, but it didn't happen overnight. It is the result of years of dedicated structural reforms. First, a crucial step was making the market more accessible. Starting January 1, 2023, Korea exempted non-resident investors from withholding taxes on interest and capital gains from KTBs. This removed a major barrier and aligned Korea with global standards. Second, the government significantly liberalized its foreign exchange (FX) market by extending onshore trading hours, making it easier for global investors to trade the Korean won.
These reforms were the key that unlocked the door. FTSE recognized these efforts by upgrading Korea’s Market Accessibility Level to '2', a prerequisite for inclusion. With eligibility confirmed, FTSE laid out a clear and predictable roadmap: KTBs will be phased into the index over eight months, from April to November 2026, eventually reaching a weight of approximately 1.75%. This gradual, transparent approach is designed to prevent market disruption and allows the vast pool of passive investment funds to adjust their portfolios smoothly.
So, what does this mean in terms of actual money? The logic is quite straightforward. Funds that track the WGBI are estimated to manage around $2.5 trillion in assets. A 1.75% allocation to Korea translates into a mechanical inflow of $44 billion to $65 billion. This isn't a speculative forecast; it's a direct calculation based on the index weight. Spread over eight months, it means an expected demand of about $5.5 billion to $8.2 billion each month. This steady demand is expected to put downward pressure on Korean bond yields (compressing the term premium) and provide support for the won. However, the ultimate impact on the currency will depend on how much of this inflow is hedged by foreign investors.
- WGBI (World Government Bond Index): A broad index that measures the performance of fixed-rate, local currency, investment-grade sovereign bonds from over 20 countries. It is a key benchmark for global bond investors.
- Term Premium: The extra compensation investors demand for holding a long-term bond instead of a series of short-term bonds. Inflows can reduce this premium, lowering long-term interest rates.
- Passive Inflow: Money that automatically flows into a market as index-tracking funds buy assets to match the composition and weighting of the index they follow.