Group 1 - Nvidia (NVDA.US) shares fell over 1.2%, closing at $179.76 [1] - AMD (AMD.US) shares declined more than 1.5%, ending at $169.6 [1] - President Trump confirmed that he has requested a 15% "transaction license tax" on chips sold to mainland China by Nvidia and AMD [1] Group 2 - Reports indicate that China has advised domestic companies to avoid using Nvidia's H20 chips, particularly in applications serving government departments [1] - AMD's AI chips are also affected by the same advisory from China [1]