Trump puts extra 100% tariff on China imports, adds export controls on 'critical software'
1. Trump announces 100% tariffs on imports from China starting November 1. 2. Export controls on critical software also effective on the same date. 3. China's rare earths exports vital to tech sectors generate tension. 4. High tariffs may affect diversified S&P 500 companies heavily reliant on imports. 5. Potential trade war escalation raises uncertainty in global markets.