South Korea's FSS warned against leveraged Samsung and Hynix ETFs, sending Micron down 13%. Here's what the memory chip cycle risk means for investors.

SEOUL, June 22 : The head of South Korea's market watchdog offered a rare mea culpa on Monday, saying it was too hasty in approving leveraged funds tied to some of the country's…

South Korean regulators move to curb risks from leveraged Samsung and SK Hynix ETFs that now drive over 30% of daily trading volume in both chipmakers.