Asian stocks mostly declined Tuesday, with the MSCI AC Asia Pacific equity gauge falling about 0.5%, as renewed selling in technology shares and geopolitical uncertainty encouraged investors to trim risk ahead of Nvidia’s Wednesday earnings and the U.S. PCE inflation report. Nvidia is expected to report quarterly revenue of roughly $92 billion, making the results a key test of whether the artificial-intelligence rally can satisfy elevated expectations. South Korea’s KOSPI fell 1.3%, led by declines in SK Hynix and Samsung Electronics, while Japan’s Nikkei and TOPIX edged higher. Australia’s S&P/ASX 200 gained 0.6%, helped by Coles and energy stocks, although Woodside Energy fell after abandoning its $5 billion clean-energy investment target. China and Hong Kong weakened, while India slipped and Singapore rose. Markets also assessed the Trump administration’s threat to broaden secondary sanctions against countries doing business with Tehran under its so-called "economic D-Day" strategy. Traders currently expect one 25-basis-point Federal Reserve hike by the end of 2026.