KOSPI plunged in a sharp market move that marked the index’s worst single-session performance in 43 years, while the Korean won weakened to an exchange rate of USD/KRW 1,518.68, up 0.42% and at its weakest level in 17 years. The slide reflected a synchronized shock from geopolitical tensions and political commentary, which pushed investors toward safe-haven assets and away from riskier Korean equities.

Market participants attributed the immediate selling pressure to a combination of the ongoing conflict involving Iran and fresh criticism of trade policy from former President Trump, both acting together to unsettle global risk appetite. That dual shock intensified a flight to safety, reducing demand for stocks and pressuring currency markets; trading desks reported heavier flows into assets perceived as safer, amplifying the downward move in the KOSPI.

The currency move compounded worries for South Korea’s import-dependent economy. With the won at multi-year lows, the cost of energy and raw materials imported into the country becomes more expensive in won terms, which can squeeze corporate margins and feed through to higher consumer prices. Analysts highlighted that rising input costs would be especially consequential for sectors heavily reliant on imported commodities and energy.

Beyond immediate price action, the episode registered prominently in market coverage and analytics: available market news rankings and CSIS numbers listed the sell-off among notable events, underscoring its significance for regional financial stability. Investors and analysts watching capital flows and trade-sensitive sectors saw the episode as a reminder of how quickly external shocks—whether geopolitical or policy-driven—can transmit into domestic markets.

Looking ahead, available reports indicate that volatility may persist while geopolitical and political uncertainties remain elevated. Policymakers and corporate risk managers are likely to monitor currency moves and commodity price pass-through closely, and market participants will be sensitive to any further statements or developments that could alter the risk landscape.

This account is based on reporting by CryptoRank, published on 2026-04-02 at 18:00, which summarized the session as a major market event driven by a simultaneous Iran-related conflict and comments on trade policy.