Reuters/China Stringer NetworkHere is what you need to know: The US fires the first shot in a trade war with China. Late Friday, Ambassador Robert Lighthizer announced an investigation into China's theft of US intellectual property using Section 301 of the Trade Act of 1974. The 10-year threatens a 2-month low. The benchmark yield is down 1 basis point at 2.18% and hovering near its lowest level since June 27. Bitcoin cash explodes over the weekend.