Nvidia, AMD help the chip sector to its highest close since February - MarketWatch
1. U.S.-China trade agreement boosted semiconductor sector and NVDA by 5.4%. 2. Phlx Semiconductor Index rose 7%, achieving its highest close since February. 3. Analysts expect more tariff reductions, potentially triggering further market gains. 4. Nvidia contributed $155 billion to tech stocks' $830 billion market cap gain. 5. Melius analysts highlight fundamentals for Nvidia amidst semiconductor demand surge.