REFINERY MARGIN TRACKER: US margins soften as coronavirus cases rise and some states reimpose stricter lockdowns2020-06-292020-06-29/wp-content/uploads/liberty-petroleum-icon-logo2.pngLiberty Petroleum Corp/wp-content/uploads/liberty-petroleum-icon-logo2.png200px200px
US refinery margins were mixed for the week ended June 26, as some states began…