The Qatar Exchange down on Thursday 14.83 points or 0.18% to 8,331.14 points from the previous closing of 8,345.97 points. The volume of shares traded up to 2,988,371 from 2,704,562 Wednesday, and the value of shares increased to QR180,118,769.21 from QR152,873,661.90 Wednesday. Among the top losers were Commercial Bank of Qatar whose share dropped 2.37% to QR70.10, Qatar Telecom lost 1.37% to QR100.50, Qatar Navigation fell 0.94% to QR63.40 and Mazaya Real Estate down 1.50% to QR10.50. Today the Qatar Banking and Financial sector up 1.81 points while the Insurance sector lost 26.69 points. The Qatar industrial sector down 9.01 points and the Services sector fell 17.72 points. (QNA)