The Saudi Stock Exchange main index ended trading lower today, losing 4.33 points to close at 12101.21 points.The total value of trading reported was SAR6 billion.The Saudi Parallel Market Index (NOMU) ended the day by gaining 173.13 points to close at 26337.13 points, valued at SAR69 million. The total number of shares traded was 4 million.Source: Saudi Press Agency