Ocado Group rallied as analysts pointed out the online grocer's strong performance since signing a deal with Morrisons to help the supermarket launch its shopping website.Bumi bounced back after reporting a loss on Thursday following news it was planning to change its name to Asia Resource Minerals and return about $400m to shareholders once it splits from Indonesia's Bakrie family.Online gaming company bwin.party tumbled after reporting a drop in first half earnings and warning that full-year revenues could fall by up to 17% as it refocuses the business to focus on fewer markets with higher returns. Evraz slumped after Goldman Sachs downgraded the steel making and mining company's shares from 'neutral' to a 'sell' rating.FTSE 250 - RisersOcado Group (OCDO) 333.50p +6.21%Micro Focus International (MCRO) 808.50p +4.66%JPMorgan Indian Inv Trust (JII) 297.00p +2.77%Fenner (FENR) 347.60p +2.33%Electrocomponents (ECM) 261.70p +2.27%Polymetal International (POLY) 746.50p +2.19%COLT Group SA (COLT) 104.10p +2.16%Bank of Georgia Holdings (BGEO) 1,780.00p +1.95%Restaurant Group (RTN) 547.50p +1.58%Bumi (BUMI) 217.40p +1.54%FTSE 250 - FallersBwin.party Digital Entertainment (BPTY) 110.60p -13.12%Brewin Dolphin Holdings (BRW) 260.90p -4.08%Evraz (EVR) 128.70p -3.96%Inchcape (INCH) 579.00p -3.74%Imagination Technologies Group (IMG) 246.70p -3.60%Hunting (HTG) 803.50p -3.37%Hochschild Mining (HOC) 259.10p -3.00%Stagecoach Group (SGC) 318.70p -2.78%Perform Group (PER) 519.00p -2.63%Homeserve (HSV) 236.50p -2.59%RD