RIYADH: Saudi stocks reversed gains at the close of Monday's trading session, in the wake of poor earnings results that worried investors. The Saudi main stock index, TASI, declined 1.78 percent to reach 12,914, while the parallel market, Nomu, dropped 1.33 percent to 22,540. Shares in Saudi Industrial Export Co. climbed 9.91 percent to lead the gainers on the closing bell.