Domino's Pizza Group rose strongly after it delivered tasty first quarter numbers, with like-for-like sales ahead 6.6 per cent thanks to new products such as its Hot Dog Stuffed Crust. Kazakhmys got a boost after Tradenext highlighted opportunities for potential upside in the sector following the sell-off in recent weeks, though these opportunities are high risk, the broker warned.Centamin declined after Camaccord Genuity reduced its target price on the stock from 90p to 38p and downgrades from a speculative buy to sell.FTSE 250 - RisersDomino's Pizza Group (DOM) 599.00p +4.90%Kazakhmys (KAZ) 358.80p +2.31%Rightmove (RMV) 1,816.00p +2.14%Essar Energy (ESSR) 140.70p +2.03%NMC Health (NMC) 318.80p +2.02%Dignity (DTY) 1,417.00p +1.65%Ferrexpo (FXPO) 163.60p +1.49%LondonMetric Property (LMP) 108.60p +1.40%Rank Group (RNK) 160.70p +1.39%African Barrick Gold (ABG) 185.60p +1.37%FTSE 250 - FallersCentamin (DI) (CEY) 42.00p -7.94%Senior (SNR) 235.00p -6.30%Heritage Oil (HOIL) 167.20p -5.86%Afren (AFR) 132.60p -5.29%Elementis (ELM) 255.60p -4.56%Ashtead Group (AHT) 607.00p -4.41%Ocado Group (OCDO) 141.90p -4.32%De La Rue (DLAR) 924.50p -4.20%Interserve (IRV) 469.20p -4.11%AZ Electronic Materials SA (DI) (AZEM) 371.70p -4.08%NR