Shares in Filtrona have jumped after the speciality plastic and fibre products provider said it continues to trade ahead of expectations. Having cheered its shareholders back in April with news of strong trading the group said that the outperformance has continued for the nine week period to 5 June.Resource stocks are weak, with oil and gas group Melrose and diamond producer Gem Diamonds among the heaviest fallers.Retailers are also weak, with electricals group Kesa and homewares chain Dunelm firmly in the red.FTSE 250 - RisersFiltrona PLC (FLTR) 229.00p +16.78%Gartmore Group (GRT) 116.80p +4.47%Yell Group (YELL) 30.97p +4.17%BlueBay Asset Management (BBAY) 298.20p +3.79%Ecofin Water & Power Opportunities (ECWO) 143.00p +3.70%Senior (SNR) 133.00p +3.10%IG Group Holdings (IGG) 451.40p +3.06%Provident Financial (PFG) 895.00p +2.99%Drax Group (DRX) 395.10p +2.76%ITE Group (ITE) 143.80p +2.71%FTSE 250 - FallersMelrose Resources (MRS) 269.30p -3.13%HMV Group (HMV) 55.95p -2.27%Gem Diamonds (GEMD) 238.10p -2.22%SIG (SHI) 109.90p -2.22%Babcock International Group (BAB) 578.50p -2.20%Kesa Electricals (KESA) 109.30p -2.06%ITV (ITV) 57.55p -1.96%Dunelm Group (DNLM) 336.30p -1.95%Inchcape (INCH) 268.00p -1.94%PZ Cussons (PZC) 324.70p -1.78%