Trendy fashion retailer SuperGroup was a heavy faller on the second-tier index after revealing a 31.5 per cent fall in first-half reported profit before tax (PBT). On an underlying basis though, PBT was up 13.1%. Rik Thakrar, the risk manager and senior dealer at Spread Co, said this morning: "Spread Co clients have approached retail stocks with caution, and Supergroup is no exception in this regard, with a clear 'sell into strength' the apparent strategy of choice for this stock." Bumi was also taking a hit after saying that it plans to cut ties with the Bakrie family "as soon as practical". Deputy Chairman Julian Horn-Smoth is reported as saying in a statement that: "The independent non-executive directors are continuing to work through a number of very complex issues as quickly as possible with a clear focus on maximizing shareholder value." Meanwhile, as on the top tier index, resource stocks were rising, led by New World Resources and pushed higher by rising metal prices and a more confident outlook on the US ahead of the looming 'fiscal cliff'.Aerospace engineer Senior also gained after saying that positive trading reported in October has continued, with adjusted pre-tax profit in line with expectations in both October and November. Shares of the London Stock Exchange gained after it became known that LCH.Clearnet plans to take its first tentative step into the Australian market early next year by offering its interest-rate-swap clearing service directly to the country's banks.FTSE 250 - RisersNew World Resources A Shares (NWR) 267.20p +9.06%Renishaw (RSW) 1,912.00p +3.69%Senior (SNR) 209.30p +3.67%Phoenix Group Holdings (DI) (PHNX) 540.50p +3.54%Telecity Group (TCY) 860.50p +3.49%Hochschild Mining (HOC) 487.60p +3.09%Heritage Oil (HOIL) 182.60p +2.70%Bank of Georgia Holdings (BGEO) 1,039.00p +2.57%Ocado Group (OCDO) 75.75p +2.43%London Stock Exchange Group (LSE) 1,009.00p +2.38%FTSE 250 - FallersSupergroup (SGP) 558.50p -6.37%Bumi (BUMI) 267.90p -5.87%Marston's (MARS) 119.80p -4.16%Ophir Energy (OPHR) 498.00p -3.49%Imagination Technologies Group (IMG) 435.50p -2.88%Dunelm Group (DNLM) 633.50p -2.54%3i Infrastructure (3IN) 123.10p -2.53%Mitie Group (MTO) 266.60p -1.88%Dixons Retail (DXNS) 27.55p -1.82%SIG (SHI) 114.60p -1.72%NR