A Hong Kong-listed leveraged SK Hynix fund swelled to around $13 billion in 9 months, becoming the biggest single stock leveraged ETF globally, according to Bloomberg.

Goldman Sachs estimated that SK Hynix's double-digit drop on a Monday obliged leveraged funds to sell roughly $5 billion of the stock at the close, which was about 18% of all trading in SK Hynix shares and futures that day.