Brewer and pub owner Greene King is topping the risers list after it saw healthy trading over the past eight weeks despite the poor weather with all of its divisions in-line or improving from the half-year. Financial services firm Matrix has kept its 'buy' rating on Greene King.SThree also reported positive trading, but it had an adverse effect on the share price. In the year to November, profits rose from £8.9m to £21.6m with an underlying improvement of 20%. The recruitment specialist was hit with a downgrade from broker Peel Hunt ('hold', from 'buy') as the shares have caught up with its target price after a strong run. Outsource specialist Mitie is also lower despite reporting that it expects to hit forecasts this year as public sector business starts to pick up following the government's programme of cutbacks.Contractor and support services firm Carillion is edging higher after announcing that it has won contracts worth around £350m this year.FTSE 250 - RisersGreene King (GNK) 469.50p +4.68%Centamin Egypt Ltd. (CEY) 135.00p +3.05%Salamander Energy (SMDR) 289.40p +2.99%Misys (MSY) 334.00p +2.45%IG Group Holdings (IGG) 452.20p +2.31%3i Infrastructure (3IN) 116.60p +1.92%Derwent London (DLN) 1,576.00p +1.68%Mcbride (MCB) 154.90p +1.57%F&C Asset Management (FCAM) 87.80p +1.56%Phoenix Group Holdings (DI) (PHNX) 621.50p +1.55%FTSE 250 - FallersSThree (STHR) 368.70p -6.66%Mitie Group (MTO) 219.40p -4.53%Ferrexpo (FXPO) 420.00p -3.98%Imagination Technologies Group (IMG) 354.50p -3.80%RPS Group (RPS) 208.60p -3.69%Hikma Pharmaceuticals (HIK) 797.50p -3.68%Cobham (COB) 211.60p -3.38%Meggitt (MGGT) 353.70p -3.10%Grainger (GRI) 97.95p -3.02%Intermediate Capital Group (ICP) 339.90p -3.00%