KODEX 200 US Treasury Bond Mixed 50 (284430) 🔎 In-depth

The benchmark is the 'KOSPI 200 US Treasury Bond Mixed Index,' calculated by the Korea Exchange (KRX). As the name suggests, it bundles two parts (legs) into one index: one leg is the Korea Exchange's KOSPI 200 (Korea's 200 large-cap stocks), and the other is an index linked to US 10-year Treasury futures (an S&P-calculated US 10-year Treasury futures index). This ETF physically holds and tracks the index so as to reflect the two legs at roughly a 50-to-50 ratio. For context, in line with a related rule revision, on June 30, 2026 this product was restructured to a '50-to-50' composition that raised the equity weighting above its previous level (the ticker, listing date, and manager remain unchanged).

Being a mixed product, its daily moves are generally milder than a 100% equity ETF, but the two legs respond to different factors. The equity leg moves with the ups and downs of the KOSPI 200 (especially big semiconductor stocks), while the bond leg moves with US Treasury prices, so when US rates rise, Treasury prices fall and become a negative factor. On top of this, the product is 'FX-exposed' on the US Treasury portion, without FX-hedging, so the KRW/USD exchange rate also directly affects performance. When the won weakens against the dollar (won weakness) the won-converted value of the bond leg rises, which is favorable; when the won strengthens it works unfavorably. In short, three factors — stocks, US rates, and FX — move together.

This is a mixed ETF aimed at stability and asset allocation. By holding stocks and US Treasuries in equal halves, it seeks lower volatility than an equity-only product, and the cushioning effect shows up best when the two assets move in opposite directions. However, cushioning is not always guaranteed. There are indeed phases where stocks and Treasuries fall 'in the same direction at the same time,' and in those cases both legs turn negative and the diversification benefit weakens. It is also worth knowing that, being FX-exposed, an unfavorable currency move can offset the support that Treasuries would otherwise provide.

On July 13, 2026 this ETF fell sharply by -5.11%. The reason the decline was large for a mixed product is that three factors happened to overlap in the same (downward) direction. First, semiconductor-led weakness sent the KOSPI plunging that day, so the equity leg fell hard. Second, US 10-year Treasury yields had risen around this time (rising yields = falling bond prices), so the bond leg was also negative. Third, the won moved to strengthen against the dollar, further weighing on the won-converted value of the FX-exposed bond leg. Normally Treasuries cushion stocks, but this day was a rare phase in which the cushioning asset weakened alongside them.

In a word, it is a 'diversified basket that holds half Korean large caps and half US Treasuries at once.' Usually US Treasuries hold up when stocks are shaken, but if US rates rise or the won strengthens the Treasury side can weaken too; just keep in mind that when all three factors overlap, as on this day, the cushioning may not work well.