Serco Group was a strong riser after Citigroup shifted its target price from 670p to 680p reiterating a buy recommendation. The sale of Russian billionaire Mikhail Prokhorov's holding in Polyus Gold, a London-listed miner, has prompted speculation of a merger between Polyus and fellow miner Polymetal, causing the latter to become a high riser on the top tier index. Sage was another strong riser. The company said this morning that it has applied for an additional 0.5m shares to be admitted to trading. Randgold Resources was once again taking a hit as the price of gold continued to slide. G4S was lower after HSBC downgraded the stock to underweight. FTSE 100 - RisersSerco Group (SRP) 587.50p +3.43%CRH (CRH) 1,379.00p +3.22%Sage Group (SGE) 342.60p +2.91%Polymetal International (POLY) 973.00p +2.85%Melrose Industries (MRO) 252.60p +2.81%Aberdeen Asset Management (ADN) 436.60p +2.66%Schroders (SDR) 2,018.00p +2.65%IMI (IMI) 1,210.00p +2.54%Hargreaves Lansdown (HL.) 862.00p +2.31%Burberry Group (BRBY) 1,399.00p +2.27%FTSE 100 - FallersRandgold Resources Ltd. (RRS) 5,370.00p -1.47%G4S (GFS) 287.50p -0.79%SABMiller (SAB) 3,220.50p -0.54%Pearson (PSON) 1,217.00p -0.41%RSA Insurance Group (RSA) 117.60p -0.34%Royal Bank of Scotland Group (RBS) 345.60p -0.26%Intu Properties (INTU) 352.90p -0.23%Wood Group (John) (WG.) 792.00p -0.19%Compass Group (CPG) 802.50p -0.19%Tesco (TSCO) 373.00p -0.17%NR