Saudi Stock Exchange's main index ended trading lower here today, losing 13.20 points to close, at 8,547.61 points. The total value of the trading reported was 9 billion, while the toll of shares traded was more than 375 million, divided into over 365,000 deals. The Saudi Parallel Equity Market Index (NOMU) ended the day losing 209.49 points, to close, at 14,419.51 points, with a valuation of more than SR16 million and an overall tally of more than 175,000 stocks traded and divided into as many as 823 deals.