Buy-to-let mortgage specialist Paragon was rising high after reporting that it continues its resurrection with plans to securitise around £150m of its mortgage book to raise fresh funds to lend out to landlords. Meanwhile the computing firm Logica has seen its share price nose dive 8.4% today as it cut its full-year sales and margin guidance, after experiencing a softening of demand in September, poor order intake and a prolonged weakness in Benelux. Wealth management group St James's Place saw its share price take a dip after its funds under management was down over the three months ended 30 September. Meanwhile, Lamprell was performing well, helped by a ratings upgrade from Investec which noted that "newbuild contracts keep coming" for the oil and gas engineering firm. The broker upped its view from hold to buy, saying that recent contract wins "further strengthen revenue visibility in 2012 and 2013."FTSE 250 - RisersParagon Group Of Companies (PAG) 166.20p +6.40%Kentz Corporation Ltd. (KENZ) 485.00p +6.17%Exillon Energy (EXI) 300.00p +4.71%Petropavlovsk (POG) 725.50p +4.54%African Barrick Gold (ABG) 548.00p +4.18%Lamprell (LAM) 241.70p +3.82%Barratt Developments (BDEV) 85.75p +3.63%Betfair Group (BET) 755.00p +3.57%Cookson Group (CKSN) 470.50p +3.41%Anglo Pacific Group (APF) 279.50p +3.17%FTSE 250 - FallersLogica (LOG) 81.90p -8.49%SThree (STHR) 253.50p -6.70%Go-Ahead Group (GOG) 1,320.00p -4.76%Premier Foods (PFD) 3.50p -4.72%St James's Place (STJ) 327.80p -4.46%Provident Financial (PFG) 1,051.00p -3.58%Spectris (SXS) 1,183.00p -2.79%COLT Group SA (COLT) 96.40p -2.63%Henderson Group (HGG) 111.50p -2.53%Allied Gold Mining (ALD) 154.50p -2.52%NR