Imagination Technologies Group was lower after Exane BNP cut its target price from 610p to 311p and downgraded the stock to neutral. Meanwhile, National Express rose after it reported it was trading in line with expectations in the first quarter after securing two major rail contracts and launching new services in the UK and Germany. Man Group got a boost after Bank of America upped its target price from 150p to 170p and reiterated a buy recommendation. Also providing a lift was JP Morgan, which raised its target price from 62p to 85p. FTSE 250 - RisersHochschild Mining (HOC) 271.50p +5.97%Kenmare Resources (KMR) 29.30p +5.24%Ocado Group (OCDO) 184.00p +4.55%Man Group (EMG) 125.10p +4.25%Kazakhmys (KAZ) 386.50p +3.76%Lonmin (LMI) 296.60p +3.60%National Express Group (NEX) 209.20p +2.75%Balfour Beatty (BBY) 214.30p +2.73%Bank of Georgia Holdings (BGEO) 1,725.00p +2.68%Elementis (ELM) 253.60p +2.59%FTSE 250 - FallersImagination Technologies Group (IMG) 296.20p -5.94%Home Retail Group (HOME) 133.40p -4.65%QinetiQ Group (QQ.) 182.90p -4.24%Taylor Wimpey (TW.) 90.30p -3.58%Carillion (CLLN) 274.90p -3.37%Cairn Energy (CNE) 279.90p -3.18%Go-Ahead Group (GOG) 1,482.00p -3.14%Heritage Oil (HOIL) 139.60p -2.99%BBA Aviation (BBA) 256.00p -2.66%Cable & Wireless Communications (CWC) 41.87p -2.63%NR