Debenhams was falling despite record Christmas sales. Although the company saw a 4.9% rise in underlying sales in the last four weeks of 2014, it recorded a 0.8% drop over the last three months.Greggs was rising after revealing an 8.2% boost in December like-for-like sales. The company announced that full-year results would be "above previous expectations".Tullett Prebon was also increasing after acquiring 40 brokers from Murphy and Durieu. This brings the London-based firm's quota of US brokers up to 550. Company chief executive officer John Abularrage said: "This acquisition allows Tullett Prebon to provide even stronger and better execution to our clients across the range of fixed income products."FTSE 250 - RisersGreggs (GRG) 806.00p +7.54%Supergroup (SGP) 814.00p +5.85%Drax Group (DRX) 375.70p +5.53%Michael Page International (MPI) 450.00p +5.51%Tullett Prebon (TLPR) 301.70p +4.76%IP Group (IPO) 222.80p +4.31%Hikma Pharmaceuticals (HIK) 2,475.00p +3.99%William Hill (WMH) 367.80p +3.75%Ladbrokes (LAD) 108.40p +3.53%Ocado Group (OCDO) 413.50p +3.40%FTSE 250 - FallersDebenhams (DEB) 69.20p -7.79%Kaz Minerals (KAZ) 235.90p -6.61%Cobham (COB) 315.60p -4.65%Betfair Group (BET) 1,482.00p -3.64%Bank of Georgia Holdings (BGEO) 2,011.00p -3.64%Entertainment One Limited (ETO) 299.80p -3.60%Fisher (James) & Sons (FSJ) 1,070.00p -3.43%Brit (BRIT) 257.20p -3.31%Cineworld Group (CINE) 402.50p -3.25%Zoopla Property Group (WI) (ZPLA) 168.00p -3.17%