Investment management firm Man Group jumped after it said that 2013 earnings per share (EPS) would be helped after a change in its regulatory status boosted surplus regulatory capital, allowing it to call/redeem certain debt securities. The strong rise came despite it saying that flows in the first quarter were "disappointing".As on the top tier index miners were making strong gains as they tracked metal prices higher and sentiment was buoyed by strong employment data in the US. African Barrick Gold was heading lower one day after Canaccord Genuity reiterated its hold rating on the stock. Imagination Technologies was also in the red after Deutsche Bank cut its rating on the stock from 'buy' to 'hold' and reduced the target price from 600p to 380p. FTSE 250 - RisersMan Group (EMG) 118.40p +11.38%Kazakhmys (KAZ) 361.70p +8.59%Ferrexpo (FXPO) 178.80p +6.62%Henderson Group (HGG) 175.70p +6.10%Kenmare Resources (KMR) 27.48p +5.17%888 Holdings (888) 178.00p +4.40%Afren (AFR) 137.80p +4.16%National Express Group (NEX) 204.30p +4.13%Fenner (FENR) 354.20p +4.12%Lonmin (LMI) 279.30p +4.10%FTSE 250 - FallersAfrican Barrick Gold (ABG) 153.90p -5.23%Imagination Technologies Group (IMG) 303.00p -3.93%Laird (LRD) 208.70p -3.47%Home Retail Group (HOME) 140.00p -2.91%Anite (AIE) 122.00p -2.79%Telecity Group (TCY) 947.50p -2.27%IP Group (IPO) 151.90p -1.43%Elementis (ELM) 250.00p -1.11%Direct Line Insurance Group (DLG) 201.60p -1.08%Computacenter (CCC) 435.50p -1.02%NR