South Korean shares, led by AI and semiconductor firms, are facing tighter financial conditions even as the KOSPI remains a top global performer. Data from BNY’s iFlow shows heavy institutional selling and extended outflows from March into April.
BNY’s iFlow is described as an EM leading indicator that combines daily cross-border security flows and matches them to official data. It indicates that inflows during the rally were increasingly unhedged, so renewed outflows could weaken the Korean won.
The report links the flow picture to elevated short-term inflation expectations, which can push yields higher and affect heavily positioned equity markets. It also flags higher input costs for Japan, South Korea, Taiwan and other net-energy importers, which may take time to normalise and reduce traditional surpluses.
It adds that weaker currency performance tied to lower net purchases can tighten domestic financial conditions and may prompt rate rises. It notes pre-emptive measures in Indonesia on Wednesday and in the Philippines earlier this month, and says APAC EM positioning may need to adjust if conditions stay tight.
We see a divergence in South Korean markets, where AI and semiconductor stocks have pushed the KOSPI to new highs. However, heavy selling from institutional investors suggests this strength may not last. This pressure is now beginning to spill over into the currency market.
The Korean Won is showing signs of stress, with the USD/KRW exchange rate breaking above 1,420 this week for the first time since the turmoil of early 2025. Given that the previous rally was largely unhedged, these outflows are having an outsized impact on the currency. Traders should consider options strategies that profit from further won depreciation, such as buying puts on KRW futures.
Looking at the KOSPI itself, foreign investors have sold a net $3.5 billion in local equities this month, targeting the very tech names that led the rally. With global memory chip prices showing signs of flattening after their strong performance last year, the upside for semiconductors seems limited. This environment suggests hedging long equity positions with KOSPI 200 index puts or selling out-of-the-money call options.
The bigger picture for Asia involves rising inflation, with South Korea’s latest CPI print holding stubbornly at 3.4%, well above the central bank’s target. We saw how central banks in Indonesia and the Philippines moved to hike rates back in 2025 to defend their currencies under similar pressures. This precedent suggests the Bank of Korea may be forced to act, further tightening financial conditions.
