Results from speciality chemicals group Elementis galvanised the share price after the cash-rich group announced plans to return surplus funds to shareholders on a regular basis. Profit before tax in the first half of 2012 rose 12% to $79.0m from $70.6m the year before, on the back of a marginal improvement in revenue to $401.3m from $396.0m in the first half of 2011. Funeral services provider Dignity was also up after it said an increase in the number of deaths in the UK had helped boost profits in the first half. Petra Diamonds slumped despite full-year revenues jumping, as the company said that the rough diamond market is "expected to remain under pressure in the short term". FTSE 250 - RisersElementis (ELM) 209.80p +4.90%Ruspetro (RPO) 149.00p +4.05%Dignity (DTY) 866.50p +2.54%Domino Printing Sciences (DNO) 551.00p +2.51%Rathbone Brothers (RAT) 1,296.00p +2.05%Hiscox Ltd. (HSX) 444.60p +1.97%Tullett Prebon (TLPR) 272.50p +1.95%Bumi (BUMI) 348.50p +1.78%Avocet Mining (AVM) 76.75p +1.66%Daejan Holdings (DJAN) 2,991.00p +1.42%FTSE 250 - FallersBwin.party Digital Entertainment (BPTY) 104.70p -5.08%Ocado Group (OCDO) 74.20p -3.89%Dixons Retail (DXNS) 16.09p -3.65%Inchcape (INCH) 376.00p -3.29%PayPoint (PAY) 701.50p -3.24%Yule Catto & Co (YULC) 139.50p -3.19%UBM (UBM) 641.00p -3.03%SEGRO (SGRO) 234.00p -2.90%Man Group (EMG) 79.85p -2.86%Bodycote (BOY) 327.50p -2.76%NR