Saudi Stock Exchange's main index ended trading lower here today, losing 16.39 points to close at 12514.37 points. The total value of the trading reported was SAR 6.9 billion, while the toll of shares traded was 223 million, divided into over 402,000 deals. The Saudi Parallel Equity Market Index (NOMU) ended the day gaining 17.88 points, to close at 22041.62 points, with a valuation of SAR 27 million and an overall tally of more than 447,000 stocks traded and divided into as many as 2082 deals.