Ashmore was a high riser after reporting that assets under management (AuM) increased by 9.4 per cent in the third quarter as it attracted funds from government clients.The news also gave sector peer Man Group a lift. Recruitment company Hays was also higher after it said it expects full-year operating profit to be at the top of the current range of market estimates. It wasn't all good news, however, after it revealed a decline in quarterly net fees amid challenging market conditions. WH Smith climbed on the back of a five per cent rise in half-year pre-tax profit driven by strong performance of its travel division. Meanwhile, Kazakhmys dropped after Exane BNP cut its target price from 500p to 350p and reiterated an underperform rating. Petropavlovsk was hit after Societe Generale reduced its target price from 470p to 275p, while maintaining its buy recommendation. FTSE 250 - RisersAshmore Group (ASHM) 399.80p +12.65%Hays (HAS) 101.20p +8.35%Man Group (EMG) 104.70p +7.16%Howden Joinery Group (HWDN) 236.00p +6.31%WH Smith (SMWH) 789.00p +5.91%Chemring Group (CHG) 276.70p +5.81%Redrow (RDW) 201.00p +5.79%Dixons Retail (DXNS) 33.63p +5.09%Spectris (SXS) 2,359.00p +4.70%Pace (PIC) 240.70p +4.38%FTSE 250 - FallersKazakhmys (KAZ) 387.80p -5.51%RPS Group (RPS) 252.90p -5.14%Petropavlovsk (POG) 199.80p -4.13%Centamin (DI) (CEY) 46.00p -2.89%Lonmin (LMI) 290.70p -2.42%Petra Diamonds Ltd.(DI) (PDL) 115.50p -2.12%African Barrick Gold (ABG) 198.10p -1.93%Salamander Energy (SMDR) 205.80p -1.86%Vesuvius (VSVS) 342.20p -1.55%Moneysupermarket.com Group (MONY) 180.30p -1.31%NR