Weak insurers and petrochemical firms were once again weighing on the Tadawul benchmark index (down 0.5% at 6,090.22 points). Saudi Basic Industries Corporation (Sabic), the largest GCC stock in relation to market capitalisation, ended 1.17% lower at SR84.50. Ongoing global worries about the economy pulled oil prices lower by 3.89% over the last month. Only 24 out of 144 traded shares agined value,