South Korea has just increased the margin requirement for leveraged trading in a single stock. The leverage mechanism in the stock market is basically the devil. Those who run the market should neither indulge it nor even provide it. Investors, in particular, should not touch leverage. In the past few days, many leveraged investors in South Korea have been liquidated, wiped out to zero, and in some cases even left owing money. There was also an incident in which an investor’s leveraged position was liquidated, and he then stabbed someone. Instead of reflecting on his own mistakes, he shifts the blame to others—absolutely despicable. ​​