The Qatar Exchange was down on Thursday 12.61 points or 0.15% to 8,190.74 points from the previous closing of  8,203.35 . The volume of shares traded up to 4,841,301 from  4,462,914 on Wednesday, and the value of shares down to QR194,866,284.83 from QR217,741,122.18    Wednesday.Among the top losers were Qatar National Bank whose share dropped by 0.72% to QR137.70, Barwa Real Estate lost 0.52% to QR28.65, Doha Bank 0.87% to QR57.10 and Islamic Insurance was down 1.35% to QR51.20. Today the Qatar Banking and Financial sector lost 38.57 and the Insurance sector down 8.64 points. The Qatar industrial sector dropped 3.03 points and the Services sector was added 2.78 points.(QNA)