Interdealer broker Tullett Prebon sank after being drawn into the LIBOR scandal. Reports suggest that an individual at the firm was part of conversations about rigging the yen LIBOR rate, according to the Financial Times. Gold miner Petropavlovsk was lower after Citi downgraded its recommendation to 'neutral'. Meanwhile, engineering and software group Invensys was performing well after Morgan Stanley lifted its view to 'overweight'.Bumi plc shares continued to fall as co-founders of the coal miner financier Nathanial Rothschild and the Bakrie Group continued to butt heads over fate of the business.Britvic was back in positive territory as the stock recovered following yesterday's news that the Office of Fair Trading has referred the tie-up with A.G. Barr to the Competition Commission. Capital & Counties Properties was boosted after Morgan Stanley upped its target price from 260p to 290p, keeping an overweight rating. FTSE 250 - RisersBritvic (BVIC) 405.00p +3.85%Capital & Counties Properties (CAPC) 256.40p +3.05%Daejan Holdings (DJAN) 3,400.00p +2.84%Rotork (ROR) 2,908.00p +2.54%RPS Group (RPS) 240.80p +2.47%Micro Focus International (MCRO) 673.00p +2.36%Invensys (ISYS) 354.90p +2.31%Inmarsat (ISAT) 663.50p +2.23%Devro (DVO) 378.10p +2.19%Telecity Group (TCY) 916.00p +2.18%FTSE 250 - FallersBumi (BUMI) 379.30p -6.58%Tullett Prebon (TLPR) 282.80p -5.92%Petropavlovsk (POG) 325.70p -4.96%Ocado Group (OCDO) 122.90p -4.36%Savills (SVS) 512.00p -4.21%African Barrick Gold (ABG) 296.30p -4.14%New World Resources A Shares (NWR) 286.90p -4.01%London Stock Exchange Group (LSE) 1,295.00p -3.43%Man Group (EMG) 107.60p -3.15%Heritage Oil (HOIL) 207.80p -2.53%NR