Dow futures soar 400 points after Trump, Vance calm markets over China trade war fears

1. S&P 500 futures rose 1.1%, easing tensions after trade war fears. 2. Trump reassured investors, suggesting U.S. wants to cooperate with China. 3. Friday's selloff saw S&P 500 log worst losses since April. 4. Tech stocks heavily affected; Nvidia, AMD, and Tesla dropped 5-8%. 5. A 10% stake in Trilogy Metals signals U.S. diversifying mineral supplies.