Asia chip stocks extend Wall Street39;s selloff
TSMC, Tokyo Electron, SK Hynix among biggest losers
TSMC due to report earnings later on Thursday

SINGAPORE, July 18 Reuters Chip stocks in Asia tumbled on Thursday, tracking a heavy selloff on Wall Street spurred by a news report that the United States was mulling tighter curbs on exports of advanced semiconductor technology to China.

Among the worst hit were shares of Taiwan Semiconductor Manufacturing Co TSMC, the world39;s largest contract chipmaker, which has shed roughly T2 trillion 61.35 billion in market value over two days.

TSMC, which reports earnings later on Thursday, has taken a double hit this week from reports of the U.S. curbs as well as remarks from U.S. Republican presidential nominee Donald Trump that Taiwan should pay America for its defence.

TSMC fell more than 3, joining other technology behemoths such as South Korea39;s major chipmakers Samsung Electronics and SK Hynix, which were down 1.85 and 4.1, respectively, and Japan39;s Tokyo Electron, which slumped more than 8.

The Global X Asia Semiconductor ETF was down 2.7, reducing gains for the year to 13.5.

The Bloomberg News report published during Asian trading hours on Wednesday said President Joe Biden39;s administration was weighing a measure called the foreign direct product rule that allows the U.S. government to stop a product from being sold if it was made using American technology.

That would potentially mean restrictions on companies…