Specialist investment firm Intermediate Capital was one of the top risers, extending gains after yesterday's trading statement in which it said assets under management were stable at €12bn in the three months to December 30th.The group also announced today that it will realise a £43m capital gain in relation to the disposal of its stake in intellectual property management firm CPA Global. Shares were up 7% today and up 12% on the week.Retailers were also making strong gains, with KESA, JD Sports and particularly Dixons performing well. South-American miner Hochschild was rising despite having said it expects silver production to be lower in 2012 than last year and to see a rise in production costs. Meanwhile, Africa-focused oil group Afren was the worst performer, pulling back after yesterday's impressive surge on the back of a significant new off-shore oil find.Tanzania-focused gold producer African Barrick Gold fell after seeing production drop 11% in the final three months of last year compared to the same period of 2010. FTSE 250 - RisersDixons Retail (DXNS) 11.81p +7.95%Intermediate Capital Group (ICP) 267.80p +6.82%Kesa Electricals (KESA) 74.95p +6.69%Talvivaara Mining Company (TALV) 339.70p +4.52%Hochschild Mining (HOC) 479.50p +4.24%Spirit Pub Company (SPRT) 45.75p +3.98%Logica (LOG) 78.95p +3.81%Aberdeen Asset Management (ADN) 226.40p +3.66%Cable & Wireless Communications (CWC) 40.25p +3.44%TUI Travel (TT.) 178.90p +3.35%FTSE 250 - FallersAfren (AFR) 125.20p -4.06%Carpetright (CPR) 531.50p -2.03%SIG (SHI) 99.00p -1.98%Kenmare Resources (KMR) 46.08p -1.87%Yule Catto & Co (YULC) 177.10p -1.83%Galliford Try (GFRD) 482.70p -1.77%Rotork (ROR) 1,925.00p -1.74%BBA Aviation (BBA) 186.90p -1.74%Senior (SNR) 178.50p -1.71%Cable & Wireless Worldwide (CW.) 16.97p -1.62%NR