[SK Hynix U.S. Stock Soars Over 2% in After-Hours Trading, Previously Dropped Over 3%] According to Golden Finance, on August 19, SK Hynix's U.S. stock surged over 2% in after-hours trading after previously dropping more than 3%. The company announced a stock buyback worth 40 trillion KRW, with the repurchased shares to be canceled and returned to shareholders. (Jin10)