Oilfield services outfit Petrofac dropped after saying it expects to recognise a further loss of $195m in 2015 for the Laggan-Tormore gas plant project on Shetland. The company, which had already recognised a $230m loss on the project in 2014, told investors earlier this year that it did not foresee a further profit or loss over the remainder of the contract duration.After an earlier rise, engineering software group Aveva dropped into the red with investors underwhelmed by a short, albeit positive, pre-close trading update which said annual results should meet analysts' forecasts.Polymer products group Victrex was advancing after Exane BNP Paribas lifted its rating on the stock to 'outperform'.Miners such as Vedanta Resources and Kaz Minerals were rising strongly as stimulus measures in China spurred buying across the sector.RisersImagination Technologies Group (IMG) 214.80p +6.07%Vedanta Resources (VED) 579.00p +4.99%Northgate (NTG) 650.50p +3.83%RPS Group (RPS) 247.60p +3.56%Bwin.party Digital Entertainment (BPTY) 81.20p +2.92%Kaz Minerals (KAZ) 234.40p +2.90%Victrex plc (VCT) 2,042.00p +2.20%Playtech (PTEC) 800.00p +2.17%Debenhams (DEB) 89.45p +2.11%Fidelity European Values (FEV) 180.50p +1.63%FallersPetrofac Ltd. (PFC) 907.00p -10.55%Bank of Georgia Holdings (BGEO) 1,960.00p -3.92%Polymetal International (POLY) 540.50p -3.65%Lonmin (LMI) 135.90p -3.00%Pets at Home Group (PETS) 257.60p -2.50%PayPoint (PAY) 864.00p -2.10%Enterprise Inns (ETI) 113.90p -1.98%NMC Health (NMC) 676.00p -1.89%Fidessa Group (FDSA) 2,287.00p -1.89%Ted Baker (TED) 2,734.00p -1.83%