RIYADH: The Saudi stock market ended Tuesday’s session lower, with oil prices returning to levels below $100 per barrel. Saudi Arabia’s main index TASI fell 0.87 percent to finish at 11,994, while the parallel market Nomu slipped 1.99 percent to 20,851. Saudi oil giant Aramco shed 0.93 percent, while Rabigh Refining and Petrochemical Co. plunged 3.1 percent. The Saudi National