The main Saudi stock market index closed Thursday up 30.58 points to reach 12,374.30 points, with trades worth SR 8.2 billion.The volume of traded shares reached 573 million shares, with 133 companies recording an increase in their value, while 91 companies closed down.The parallel Saudi stock market index (Nomu) closed Thursday down 125.91 points to reach 25,527.47 points, with trades worth SR 37 million, and the volume of traded shares reached 2 million shares.Source: Qatar News Agency