Saudi Arabia finished the week negatively. The Tasi composite ended 0.32% lower at 6,343.47 points, due to weak petrochemical shares. Saudi Kayan Petrochemical Company e. g. lost 0.32% and ended at SR20.08. The cement sector was the only industry index which bucked the trend. The Tadawul market in Riyadh remains closed on Thursdays and Fridays.