Bwin.party shares jumped after it confirmed speculation that it has started discussions with various parties about potential business combinations. The company said the talks may or may not result in an offer being made.UK price comparison website firm Moneysupermarket.com cheered after reporting an 18% increase in revenue for the three months to 30 September.Plastic and packaging components group Essentra pleased investors with its proposal for a £160m fundraising after agreeing to acquire a Dutch healthcare packaging business for $455m (£285m). The group has signed an agreement to buy the specialist packaging division of Amsterdam-based Clondalkin Group, which is owned by US private equity giant Warburg Pincus.Meanwhile, shares in online gaming software group Playtech retreated after it unveiled plans for a €315m convertible bond issue in order to pursue acquisitions. The company, which had cash of €402m at the end of September, is offering senior, unsecured convertible bonds due in 2019.Insulation products supplier SIG fell after it warned full year results would be slightly lower than previously thought due to tough European markets and foreign exchange effects.Diploma fell after announcing the departure of its chairman John Rennocks will take place in January.FTSE 250 - RisersBwin.party Digital Entertainment (BPTY) 120.00p Senior (SNR) 282.70p +4.28%Kaz Minerals (KAZ) 255.90p +4.19%Petra Diamonds Ltd.(DI) (PDL) 179.70p +4.05%Just Eat (JE.) 322.40p +4.00%BTG (BTG) 780.50p +3.45%African Barrick Gold (ABG) 216.90p +3.14%Moneysupermarket.com Group (MONY) 211.40p +3.07%Essentra (ESNT) 735.00p +3.01%IP Group (IPO) 202.00p +2.54%FTSE 250 - FallersPlaytech (PTEC) 616.50p -7.99%SIG (SHI) 148.20p -5.90%Ocado Group (OCDO) 304.10p -4.37%NMC Health (NMC) 471.00p -3.88%Morgan Advanced Materials (MGAM) 287.00p -3.69%Supergroup (SGP) 801.50p -3.02%Synthomer (SYNT) 202.00p -2.88%PayPoint (PAY) 932.50p -2.86%Aberforth Smaller Companies Trust (ASL) 1,060.00p Enterprise Inns (ETI) 126.20p -2.02%