三大期指走低，热门中概股普涨；韩国三大电视台因版权问题起诉OpenAI；特朗普要求网飞开除董事会成员苏珊·赖斯【美股盘前】

Group 1 - The U.S. stock futures are declining due to uncertainty surrounding the U.S. tariff policy, with Dow futures down 0.29%, S&P 500 futures down 0.30%, and Nasdaq futures down 0.33% [1] - President Trump announced a new executive order to impose a 15% global import tariff starting February 24, 2026, following a Supreme Court ruling that deemed previous large-scale tariffs as "overreach" [1] - The semiconductor sector is also experiencing a downturn, with major companies like TSMC and ASML dropping over 1%, and Micron Technology nearly 1% [2] Group 2 - Chinese concept stocks are seeing a pre-market rally, with Pinduoduo and NIO rising nearly 2%, JD.com and Alibaba up over 1%, and Baidu increasing over 0.5% [1] - Novo Nordisk's stock fell by 11% in pre-market trading after clinical trial results showed its drug Cagrisema was less effective than Eli Lilly's Tirzepatide [2] - Citigroup has raised its expectations for U.S. stocks, citing strong performance in Q4 of the previous year, with improved earnings and sales growth supporting a positive outlook for the current year [3]