[South Korea Tightens Single-Stock Leveraged ETFs with Immediate Effect: Samsung and SK Hynix Face Sell-Offs, Retail Trading Volume Plummets Over 90%] According to South Korean media outlet Edaily, starting July 31, South Korea's financial regulatory authorities raised the minimum margin requirement for single-stock leveraged ETFs from 10 million won to 30 million won. Additionally, from August 19, investors are required to complete simulated trading before engaging in transactions. Data from the Korea Exchange shows that between July 31 and August 28, South Korean retail investors recorded a net sell-off of 16 single-stock leveraged/inverse ETFs linked to Samsung Electronics and SK Hynix, totaling 1.773 trillion won (approximately $1.3 billion). Among these, eight products related to SK Hynix saw a net sell-off of 1.2415 trillion won, while eight products related to Samsung Electronics recorded a net sell-off of 531.6 billion won. Trading activity also dropped significantly, with the average daily trading volume of these 16 ETFs falling from 11.6787 trillion won before the new regulations to 1.0059 trillion won in August, representing only about 8% of the previous level.