$Micron Technology(MU)$ $SK hynix(SKHY)$ It looks like Korean market officials are now directing funds and pensions to rebalance their holdings by the minute as prices drop, effectively buying to maintain weight in an index or ETF. That seems to have stopped the bleeding, and it makes shorting more expensive and riskier.

This approach also helps keep funds in some kind of price equilibrium since their value won't necessarily fall in lockstep with the underlying stocks, and it brings the forced selling from margined-out traders under better control. I suspect these rules will stay in place until traders stop targeting the downside of the market and stocks. The president is pretty upset over there, and new rules tend to fly every time the market gets targeted to the downside.

It seems clear that the single-stock leveraged ETFs will disappear through attrition and their own demise. They're already banned, so new ones can't be introduced to the market. As more rules get introduced, trading these ETFs will eventually become too inconvenient.