RIYADH: Saudi stocks closed Monday almost flat as investors worried about global affairs following Russia's invasion of Ukraine. At the closing bell, the main index, TASI, flattened at 12,808, and the parallel market Nomu slipped 0.50 percent to 24,628. UAE stock markets were volatile, Abu Dhabi index ended flat, while Dubai's DFMGI fell 0.9 percent for the second straight