Analysts say single-stock leveraged ETFs tracking Samsung Electronics and SK Hynix were forced on Tuesday to sell about $6bn of shares to restore target leverage, with those sales amounting to roughly 14% of each stock’s daily turnover. Both names tumbled about 13%, driving the KOSPI to its largest one-day drop since the Iran war outbreak; the two firms together account for more than 55% of the index’s weight. Bloomberg ETF analyst Rebecca Sin said: "Yesterday's decline was not a market rebound.

Analysts say single-stock leveraged ETFs tracking Samsung Electronics and SK Hynix were forced on Tuesday to sell about $6bn of shares to restore target leverage, with those sales amounting to roughly 14% of each stock’s daily turnover. Both names tumbled about 13%, driving the KOSPI to its largest one-day drop since the Iran war outbreak; the two firms together account for more than 55% of the index’s weight. Bloomberg ETF analyst Rebecca Sin said: "Yesterday's decline was not a market rebound. The selling pressure stemmed from mechanical rebalancing by these products to reset their daily 2x weights, which amplified falls in stocks that already make up half the index."