Saudi Stock Exchange's main index ended trading lower here today, losing 38.31 points to close, at 8,553.79 points. The total value of the trading reported was over 11.5 billion, while the toll of shares traded was more than 530 million, divided into over 470,000 deals. The Saudi Parallel Equity Market Index (NOMU) ended the day losing 584.21 points, to close, at 14,643.52 points, with a valuation of more than SR29 million and an overall tally of more than 425,000 stocks traded and divided into as many as 1,107 deals.