Interdealer broker Tullett Prebon disappointed the market on Friday by saying that it will take a 20m-pound one-off hit this year as it scales back costs and cuts jobs amid a challenging market. The company also said that the level of activity in financial markets has remained "subdued" since the start of 2014 and revenues over the first four months were 12% lower at £248m on a constant currency basis.Hedge-fund manager Man Group said that net inflows of $2bn helped funds under management grow in the first quarter, but shares fell after its executives sounded a cautious note on the outlook. Oil services firm Wood Group was also a heavy faller today as the sector was dampened by a gloomy outlook from peer Petrofac which warned of lower profits this year.Department store Debenhams was making gains high street peer John Lewis reported 14.5% annual sales growth in the week to May 3rd.FTSE 250 - RisersGenus (GNS) 1,085.00p +3.33%Debenhams (DEB) 82.10p +2.62%esure Group (ESUR) 255.20p +1.88%COLT Group SA (COLT) 142.50p +1.79%Greencore Group (GNC) 264.50p +1.73%IP Group (IPO) 179.40p +1.53%Thomas Cook Group (TCG) 180.50p +1.35%Perform Group (PER) 253.30p +1.32%Keller Group (KLR) 986.50p +1.18%CSR (CSR) 557.00p +1.18%FTSE 250 - FallersTullett Prebon (TLPR) 295.40p -6.43%Wood Group (John) (WG.) 772.00p -4.22%Supergroup (SGP) 1,130.00p -4.16%Man Group (EMG) 97.50p -3.18%Imagination Technologies Group (IMG) 191.20p -2.94%Just Retirement Group (JRG) 156.90p -2.85%ICAP (IAP) 389.40p -2.77%Infinis Energy (INFI) 210.00p -2.73%Drax Group (DRX) 658.50p -2.73%Grainger (GRI) 218.10p -2.59%NR