RIYADH: Saudi Arabia’s main stock index opened lower Sunday as the rebound in share prices paused on cautious investor sentiment. As of 10:22 a.m. Saudi time, the main index — TASI — opened 0.70 percent lower at 12,183. The parallel market Nomu was down by 0.9 percent to reach 24,992. Marketing firm Tihama Advertising and Public Relations Co. rose by 7.16 percent to top the