Howden Joinery Group, which supplies kitchens and joinery to trade companies, rose to the top of the FTSE 250 after posting a jump in first-half pre-tax profit to 43.2m pounds from last year's 25.9m pounds.Lancashire Holdings gained after the British insurer reported losses from the 2012 Costa Concordia shipwreck off the Italian coast that came in lower than expected. AZ Electronic Materials SA, on the other hand, slumped after Deutsche Bank reduced its rating to 'hold' in a note issued on Thursday.Kazakhmys retreated after the company reported second quarter copper output that fell short of analysts' estimates. FTSE 250 - RisersHowden Joinery Group (HWDN) 286.00p +3.81%Lancashire Holdings (LRE) 807.50p +3.13%Bank of Georgia Holdings (BGEO) 1,851.00p +3.12%QinetiQ Group (QQ.) 190.00p +2.65%Wetherspoon (J.D.) (JDW) 769.00p +2.53%Halma (HLMA) 535.00p +2.39%IG Group Holdings (IGG) 576.50p +1.86%RPS Group (RPS) 233.80p +1.83%Bumi (BUMI) 228.00p +1.33%St. Modwen Properties (SMP) 314.00p +1.32%FTSE 250 - FallersAZ Electronic Materials SA (DI) (AZEM) 305.40p -6.49%Kazakhmys (KAZ) 266.30p -5.23%Ferrexpo (FXPO) 165.90p -5.15%Evraz (EVR) 101.90p -3.78%Synergy Health (SYR) 1,102.00p -3.67%Hochschild Mining (HOC) 166.50p -3.65%Mitchells & Butlers (MAB) 412.40p -3.37%Homeserve (HSV) 275.90p -2.99%Marston's (MARS) 160.10p -2.67%Great Portland Estates (GPOR) 556.50p -2.62%RD