Housebuilder Bellway is among the risers after announcing it expects net interim profits to be 20% higher than last year as buyer interest has picked up a little since the government's comperehensive spending review. Completions in the six months to 31 January 2011 will be similar to last year, albeit at a slightly higher average selling price, with the result net profit before tax will rise by up to 20%, the group says. Also higher is plastics group Victrex after it posted record revenue and profit, upped its dividend and offered a special dividend for the year ended September.The Lancashire-based group said results were boosted by increased demand among manufacturers for heat resistant plastic. FTSE 250 - RisersSt. Modwen Properties (SMP) 152.10p +8.26%Persimmon (PSN) 413.30p +8.00%Bellway (BWY) 597.00p +6.99%Hochschild Mining (HOC) 663.50p +6.84%Taylor Wimpey (TW.) 28.90p +6.13%Barratt Developments (BDEV) 83.50p +5.96%Kenmare Resources (KMR) 27.31p +5.85%Hunting (HTG) 693.00p +5.80%Hansen Transmissions International NV (DI) (HSN) 57.00p +5.56%Carpetright (CPR) 757.50p +4.77%FTSE 250 - FallersITE Group (ITE) 225.20p -2.76%Senior (SNR) 139.00p -2.52%Helical Bar (HLCL) 273.80p -2.39%Big Yellow Group (BYG) 330.70p -2.04%Domino's Pizza UK & IRL (DOM) 541.50p -1.99%DS Smith (SMDS) 188.60p -1.92%PZ Cussons (PZC) 403.00p -1.47%Kier Group (KIE) 1,317.00p -1.27%Laird (LRD) 152.90p -1.23%Atkins (WS) (ATK) 728.00p -1.15%