Despite ongoing economic instability, Barclays topped the leader board in the morning session in London, with Lloyds and RBS hot on its heels, helped by an upbeat research note on the sector from Societe Generale. Commodities trader Glencore took a small hit despite crude oil closing at its highest level of the week. There was only one faller on the FTSE 100 at 12:25. FTSE 100 - RisersBarclays (BARC) 188.35p +5.90%Inmarsat (ISAT) 423.90p +5.47%Kazakhmys (KAZ) 1,004.00p +5.19%Royal Bank of Scotland Group (RBS) 26.41p +4.51%Lloyds Banking Group (LLOY) 33.38p +3.63%Essar Energy (ESSR) 293.10p +3.61%Carnival (CCL) 1,895.00p +3.55%Weir Group (WEIR) 1,851.00p +3.41%Rolls-Royce Group (RR.) 587.50p +3.34%Aggreko (AGK) 1,826.00p +3.28%FTSE 100 - FallersARM Holdings (ARM) 515.50p -0.87%