SK Hynix reported net profit of 93.92 trillion won, operating profit of 60.54 trillion won, and sales of 79.31 trillion won for the April-June quarter, with year-on-year increases of 1,242.5 percent, 557.2 percent, and 256.8 percent respectively. Operating margin reached 76 percent, exceeding analyst estimates. Results were driven primarily by high-bandwidth memory chips.