South Korean chipmaker SK Hynix reported record revenue and operating profit for the second quarter of 2025, with net profit surging 1,243 percent year-on-year to 93.92 trillion won (US$64.6 billion), driven by soaring demand for high bandwidth memory (HBM) chips used in AI systems. The company's operating profit margin reached 76 percent — an exceptionally rare figure for a manufacturer — surpassing rival TSMC (Taiwan Semiconductor Manufacturing Co.) for the third consecutive quarter. The results, which beat analyst expectations, are expected to ease market concerns about a potential AI investment bubble, with SK Hynix holding a 58 percent share of the global HBM market and beginning mass shipments of its next-generation HBM4 chips.