Halfords Group was at the top of the FTSE 250 leaderboard on Wednesday after the UK retailer of car maintenance, cycling and touring products reported a 8.8 per cent rise in revenue for the 13 weeks to June 28th.Countrywide's shares surged as Credit Suisse reiterated an 'outperform' rating on the stocks and raised its target price from 510p to 700p.Bwin.party Digital Entertainment, however, retreated after the online gambling company said its revenue since April has been "softer than expected" due to lower margins in sports betting and competitive pressures in bingo.Dechra Pharmaceuticals slumped after saying adverse weather and supply issues in the US affected trading in the third quarter.FTSE 250 - RisersHalfords Group (HFD) 349.00p +9.68%Countrywide (CWD) 571.50p +3.91%RPC Group (RPC) 409.00p +2.89%Soco International (SIA) 362.50p +2.63%Hikma Pharmaceuticals (HIK) 1,097.00p +2.24%Rank Group (RNK) 166.00p +1.84%Fidelity China Special Situations (FCSS) 87.70p +1.50%Kentz Corporation Ltd. (KENZ) 406.60p +1.12%Essar Energy (ESSR) 125.20p +0.97%UBM (UBM) 674.00p +0.82%FTSE 250 - FallersBwin.party Digital Entertainment (BPTY) 120.10p -7.97%Dechra Pharmaceuticals (DPH) 691.50p -7.24%Hochschild Mining (HOC) 158.40p -6.82%ICAP (IAP) 374.70p -6.33%African Barrick Gold (ABG) 104.20p -4.93%Polymetal International (POLY) 482.50p -4.64%Crest Nicholson Holdings (CRST) 343.50p -4.58%Spectris (SXS) 1,934.00p -4.54%RPS Group (RPS) 221.00p -4.33%Britvic (BVIC) 502.50p -4.29%RD