Imagination Technologies continued to rise one day after reporting a confident outlook on the basis of royalty growth and steady licensing. Ocado shares continued their recent rise, which analysts at the Motley Fool website attributed to "good momentum" after recent struggles and its deal with supermarket chain Morrison, which provided it with an injection of cash. Also on the up was Carillion, the integrated support services company, after it was named preferred bidder for a 12-year Canada highways maintenance deal. The contract, which is expected to be worth over £100m, was awarded by the Ontario Ministry of Transportation, for which Carillion will provide routine inspection and maintenance services, including snow clearance, together with minor capital works, for over 1,000 kilometers of two-lane equivalent highway. Meanwhile, falling metal prices pressured Hochschild Mining and African Barrick lower, while Salamander Energy was in the red despite news it has started drilling an exploration well in the Gulf of Thailand.Ladbrokes was among the worst performers after going ex-dividend, alongside IG Group, Dunelm, Kier, Renishaw, Interserve, and Computacenter. FTSE 250 - RisersImagination Technologies Group (IMG) 348.40p +4.12%Ocado Group (OCDO) 400.80p +3.57%esure Group (ESUR) 240.60p +2.82%United Drug (UDG) 335.40p +1.95%Betfair Group (BET) 1,094.00p +1.77%Tullett Prebon (TLPR) 375.90p +1.57%Hiscox Ltd (HSX) 636.00p +1.44%Wetherspoon (J.D.) (JDW) 740.50p +1.37%Hays (HAS) 113.90p +1.33%Carillion (CLLN) 324.80p +1.28%FTSE 250 - FallersHochschild Mining (HOC) 212.90p -7.23%Salamander Energy (SMDR) 122.50p -4.74%Supergroup (SGP) 1,146.00p -4.10%Ladbrokes (LAD) 193.20p -3.98%African Barrick Gold (ABG) 136.90p -3.66%Keller Group (KLR) 1,060.00p -3.55%National Express Group (NEX) 265.20p -3.28%Berkeley Group Holdings (The) (BKG) 2,063.00p -3.24%Bellway (BWY) 1,329.00p -3.20%Britvic (BVIC) 574.00p -3.04%NR