The retailers are falling heavily on Friday, with ultra-trendy fashion group Supergroup posting losses of around 7%. The firm revealed last month that its sales growth rate was lower in the three months to 1 May compared with the preceding quarter. Shares have dropped by over a third during the last four weeks.Sports apparel retailer Sports Direct and electrical goods retailer Kesa Electricals are also among the worst performers.Victrex is heading lower, despite UBS raising its target price on the stock by a quarter. The broker has scaled back its full year estimates for the polymer manufacturer as the second half is a seasonally-weaker period and has been affected by a 2-month plant shutdown (which has added £3m to costs). Aquarius is in the red after joining forces with platinum mining peers Sylvania to test the feasibility of extracting and processing ore from an area in South Africa. RIT Capital Partners has underwhelmed the market after reporting that its net asset value per share hit a new high at the end of March. ---BCFTSE 250 - RisersCable & Wireless Worldwide (CW.) 53.70p +4.17%Stagecoach Group (SGC) 250.00p +4.12%Dixons Retail (DXNS) 18.86p +3.97%Hochschild Mining (HOC) 543.00p +2.55%Laird (LRD) 139.90p +2.49%Invensys (ISYS) 309.50p +2.42%Chemring Group (CHG) 671.50p +1.97%Avis Europe (AVE) 190.00p +1.88%St James's Place (STJ) 344.40p +1.83%Cranswick (CWK) 779.00p +1.76%FTSE 250 - FallersSupergroup (SGP) 1,033.00p -6.68%Intermediate Capital Group (ICP) 322.70p -6.46%Redrow (RDW) 118.90p -3.25%Brewin Dolphin Holdings (BRW) 162.20p -2.70%Enterprise Inns (ETI) 77.85p -2.44%Kenmare Resources (KMR) 46.48p -2.21%Kesa Electricals (KESA) 145.90p -2.21%Moneysupermarket.com Group (MONY) 98.80p -2.18%Sports Direct International (SPD) 229.00p -2.18%Premier Foods (PFD) 31.22p -2.04%