BT Group was the highest riser on the FTSE 100 after the UK phone company reported third-quarter earnings that beat analysts' estimates. The group also raised its earnings outlook for the year.BG Group's shares regained strength following a sharp fall earlier in the week when the British gas explorer said strife in Egypt and the fracking revolution in the US had hurt production. Imperial Tobacco Group gained after Goldman Sachs lifted its rating from 'neutral' to 'buy' and raised its target price from 2,545p to 2,840p.Randgold Resources advanced as it announced Chairman Philippe Liétard will step down and be replaced by Christopher Coleman, who has been an independent Non-Executive Director of the gold miner since 2008.Bottling company Coca-Cola HBC slumped after beverage company Diageo reported a worse-than-expected slowdown in sales growth in the last six months, blaming a sharp drop in demand in China and other emerging markets.Sage Group declined as analysts at Panmure Gordon reiterated a 'hold' rating for the software company, citing growing competition.Copper producer Antofagasta edged lower as the price of the metal fell in afternoon trading. On Wednesday the miner reported record copper production in 2013, but warned its 2014 guidance showed output would ease slightly. FTSE 100 - RisersBT Group (BT.A) 379.90p +2.43%BG Group (BG.) 1,021.50p +1.29%Imperial Tobacco Group (IMT) 2,210.00p +1.28%Randgold Resources Ltd. (RRS) 4,188.00p +1.11%Burberry Group (BRBY) 1,424.00p +0.92%Persimmon (PSN) 1,295.00p +0.39%National Grid (NG.) 782.50p +0.06%FTSE 100 - FallersCoca-Cola HBC AG (CDI) (CCH) 1,601.00p -3.96%Sage Group (SGE) 406.80p -3.26%Antofagasta (ANTO) 847.50p -2.98%Tullow Oil (TLW) 788.00p -2.90%ITV (ITV) 196.00p -2.87%RSA Insurance Group (RSA) 96.80p -2.86%Aberdeen Asset Management (ADN) 390.60p -2.76%CRH (CRH) 1,555.00p -2.69%Hargreaves Lansdown (HL.) 1,474.00p -2.64%Standard Life (SL.) 361.20p -2.59%RD