Trump tariffs and export curbs on China cast a cloud over major chip stocks
1. Semiconductor firms face demand uncertainty due to U.S. tariff changes. 2. AMD expects $1.5 billion loss from export curbs on AI chips to China. 3. Marvell postpones investor day citing macroeconomic uncertainties. 4. VanEck Semiconductor ETF is down nearly 12% this year. 5. Nvidia warns losing access to China could hinder U.S. AI market growth.