Bwin.party Digital Entertainment saw its share price head north as rumours persist that a US company has it in its sights.Casinos operator Wynn Resorts is one name in the frame, with a take-out price of 170p per share being talked about.Bwin.party, the world's largest online gaming group, already has its US poker network, OnGame, on the auction block. The sale is expected to generate between 20m and 30m euros ($28.5m to $42.7m), a modest figure reflecting the loss of players the network will encur through the sale. Irish mining company Kenmare Resources was rapidly heading back down following a rally of 7.5% on Monday on the back of a tip in the Daily Telegraph which declared Kenmare a "bargain share". FTSE 250 - RisersBwin.party Digital Entertainment (BPTY) 112.50p +6.43%Premier Foods (PFD) 14.82p +2.07%Heritage Oil (HOIL) 228.40p +1.42%Daejan Holdings (DJAN) 2,510.00p +1.41%Domino's Pizza UK & IRL (DOM) 493.30p +1.34%Victrex (VCT) 1,316.00p +1.23%Stobart Group Ltd. (STOB) 136.40p +0.74%Dairy Crest Group (DCG) 354.40p +0.68%St. Modwen Properties (SMP) 141.00p +0.64%BlueCrest AllBlue Fund Ltd. GBP Shares (BABS) 169.00p +0.60%FTSE 250 - FallersKenmare Resources (KMR) 44.95p -5.45%Telecom Plus (TEP) 644.50p -4.80%Yule Catto & Co (YULC) 179.50p -4.52%Ashtead Group (AHT) 118.10p -4.22%Morgan Crucible Co (MGCR) 277.20p -4.22%Talvivaara Mining Company (TALV) 360.00p -4.13%St James's Place (STJ) 341.30p -4.10%Regus (RGU) 79.90p -4.02%Afren (AFR) 108.30p -3.99%Ferrexpo (FXPO) 372.10p -3.55%NR