Bellway, Barratt Development, and Taylor Wimpey were among the best performing stocks on the FTSE 250 this afternoon as the outlook for the UK housing market continues to brighten. JPMorgan upgraded its rating for Barratt today to 'overweight', although cut Bovis Homes to 'underweight'.Keller Group, the ground engineering specialist, climbed on the news it has scored a contract for the construction of a diaphragm wall and bored and secant piles. Under the £33m deal, the group will construct the foundation of a new Sengkang hospital project for the Singapore Ministry of Health.Meanwhile, miners were leading the downside with Kazakhmys, EVRAZ, Polymetal and Ferrexpo registering moderate losses. AZ Electronic Materials was also in the red; on Friday Numis Securities downgraded the stock from 'hold' to 'reduce', while Deutsche Bank reiterated its 'hold' rating. FTSE 250 - RisersBellway (BWY) 1,311.00p +3.88%Thomas Cook Group (TCG) 152.70p +3.53%Taylor Wimpey (TW.) 100.20p +3.30%Keller Group (KLR) 1,031.00p +2.89%Barratt Developments (BDEV) 310.70p +2.85%Kenmare Resources (KMR) 28.69p +2.46%Dignity (DTY) 1,442.00p +1.98%Playtech (PTEC) 734.50p +1.87%Workspace Group (WKP) 452.70p +1.78%Redrow (RDW) 231.00p +1.76%FTSE 250 - FallersKazakhmys (KAZ) 262.50p -4.16%Imagination Technologies Group (IMG) 325.80p -3.89%Greggs (GRG) 423.50p -3.04%Man Group (EMG) 83.65p -3.01%AZ Electronic Materials SA (DI) (AZEM) 292.00p -2.47%Cobham (COB) 286.80p -2.32%Premier Oil (PMO) 325.60p -2.31%Polymetal International (POLY) 655.00p -2.24%QinetiQ Group (QQ.) 191.80p -2.24%Centamin (DI) (CEY) 44.37p -2.16%NR