RIYADH: Saudi stocks closed lower in the previous session, as Fitch revised the ratings of major listed companies and earnings continued to kick in. TASI the main index slipped 0.3 percent to 13,503, and the parallel market Nomu edged up by 0.6 percent. Among the heaviest weights on TASI, oil giant Aramco and SABIC both advanced, after Fitch Ratings revised their long-term