(Kitco NewsWire) - Spot gold and silver prices are lower after the close Monday, as crude oil jumped, Treasury yields firmed and U.S.-Iran negotiations remained unresolved. At the time of writing, spot gold was trading near $4,482.30 an ounce, down 1.26%, while spot silver was trading near $74.795, down 0.64% on the session.The May ISM manufacturing index rose to 54.0 from 52.7 in April, marking a fifth straight month of expansion and the strongest reading since May 2022. New orders improved to