Nickel and zinc specialist Talvivaara Mining moves higher in line with a rally across the mining sector amid hopes of a global economic recovery. South American precious metal miner Hochschild Mining is also doing well.Housebuilders are also doing well, with Taylor Wimpey, Redrow and Barratt in the top 10. Hometrack, the housing market analyst, said that the average house price stayed the same from April to May at £155,600, the first time in 20 months it hasn't fallen month-on-month.FTSE 250 - RisersCookson Group (CKSN) 297.25p +10.09%Enterprise Inns (ETI) 160.75p +8.61%Taylor Wimpey (TW.) 34.75p +8.59%Talvivaara Mining Company (TALV) 360.50p +8.10%3i Group (III) 261.00p +7.85%DSG International (DSGI) 25.25p +7.45%Hochschild Mining (HOC) 307.75p +6.86%Charter International (CHTR) 564.50p +6.81%Redrow (RDW) 208.50p +6.51%Barratt Developments (BDEV) 168.75p +6.47%FTSE 250 - FallersCatlin Group (CGL) 341.00p -3.94%BTG (BGC) 150.25p -1.96%Domino Printing (DNO) 214.75p -1.94%Hiscox (HSX) 319.25p -1.77%Hansard Global (HSD) 134.25p -1.65%Robert Wiseman (RWD) 383.75p -1.35%Berkeley Group Holdings Units (BKG) 875.00p -1.30%BH Global USD Shares (BHGU) 9.80000000 -1.01%Jardine Lloyd Thompson Group (JLT) 423.75p -0.99%Morgan Sindall (MGNS) 653.50p -0.98%