After being under the cosh yesterday following disappointing results security services group G4S has taken another battering today as rumours circulate that a massive placing of the company's shares is underway in the City. Around 141m shares have reportedly been placed by RBS at 250p per share. The shares represent around 10% of the issued share capital of G4S and were held by major shareholder Skagen Trust, which acts for the family of company founder Jorgen Philip-Sorensen. Hedge fund manager Man is another poor performer after its flagship AHL fund lost value last week. Broker Morgan Stanley has cut its price target for the stock from 340p to 260p.Miners are up acorss the board as Goldman Sachs issued a bullish note suggesting that rising commodity prices will drive share prices higher across the sector. Silver miner Fresnillo is the best performer.FTSE 100 - RisersResolution (RSL) 73.80p +3.14%Fresnillo (FRES) 849.50p +2.85%Autonomy Corporation (AU.) 1,777.00p +2.36%Kingfisher (KGF) 228.00p +2.24%Cairn Energy (CNE) 388.80p +2.18%Next (NXT) 2,078.00p +2.16%Kazakhmys (KAZ) 1,527.00p +2.07%Anglo American (AAL) 2,734.00p +2.01%FTSE 100 - FallersMan Group (EMG) 236.40p -4.02%G4S (GFS) 258.90p -3.83%Standard Life (SL.) 208.50p -3.78%Thomas Cook Group (TCG) 244.10p -3.13%Inmarsat (ISAT) 770.00p -2.10%British Airways (BAY) 241.10p -1.99%Marks & Spencer Group (MKS) 355.00p -1.96%Shire Plc (SHP) 1,438.00p -1.91%