REFINERY MARGIN TRACKER: US margins end 2021 on high note as omicron variant looms2022-01-032022-01-03/wp-content/uploads/liberty-petroleum-icon-logo2.pngLiberty Petroleum Corp/wp-content/uploads/liberty-petroleum-icon-logo2.png200px200px
US refining margins rose for the week ended Dec. 31, putting a strong finish on…