SIG, the building products distributor, fell after saying it was buffeted by bad weather and a weak euro in the first half, with more challenges ahead in the second. The firm expects its six month figures to be broadly flat in constant currency terms, but said that total sales in the first half fell by nearly four per cent in sterling terms. ?? Some market commentary is attributing the rise in shares of Afren to reports in the Daily Mail to the effect that Exxon Mobil and Eni may bid for the company. ??Online gaming firm bwin.party dropped after revealing that it has been hit by weak poker revenues and the lack of shock results at the Euro 2012 football championship. Meanwhile, iron ore producer Ferrexpo rose after seeing pellet production rise in the second quarter, though year-to-date production is down year-on-year because of lower availability of third party concentrate. FTSE 250 - RisersAfren (AFR) 114.70p +9.45%Interserve (IRV) 335.60p +5.77%Ferrexpo (FXPO) 209.70p +5.06%Renishaw (RSW) 1,370.00p +4.18%Cape (CIU) 281.10p +4.07%Shanks Group (SKS) 79.90p +3.90%Hunting (HTG) 741.00p +3.71%International Personal Finance (IPF) 249.60p +3.65%Chemring Group (CHG) 286.70p +3.20%Hays (HAS) 73.15p +3.17%FTSE 250 - FallersAvocet Mining (AVM) 67.80p -6.80%SIG (SHI) 91.70p -4.53%Home Retail Group (HOME) 81.85p -3.25%Aquarius Platinum Ltd. (AQP) 40.25p -3.22%Essar Energy (ESSR) 114.70p -2.96%Filtrona PLC (FLTR) 460.50p -2.85%Balfour Beatty (BBY) 302.90p -2.60%Bwin.party Digital Entertainment (BPTY) 105.00p -2.60%FirstGroup (FGP) 206.10p -2.55%Rank Group (RNK) 119.20p -2.46%NR