The AI trade has a new bogeyman keeping it up at night

Jade GAO / AFP via Getty ImagesA sell-off in South Korean chipmaker stocks sent a ripple effect worldwide.US chipmakers were sharply lower, exposing their vulnerability to runaway valuations in the Korean market.Now traders have to worry about the top-heavy Korean market foiling best-laid plans overnight.US investors have a tendency to be myopic. And who can blame them? They trade in the biggest market. All the biggest companies are American.That focus has been reaffirmed in recent months, with