Mining stocks Kenmare and Ferrexpo were on the up after Chinese GDP data came in below expectations, which sent rumours flying around that the 'weak' (by Chinese standards) growth may prompt the central bank to boost the economy by launching new stimulus measures. Burkina Faso-focused gold miner Avocet Mining says it may have to construct a new process plant at its Inata project, rather than just extend the existing plant, in order to provide more processing flexibility. Shares fell over 3%. ??Oil and gas group Premier Oil was in the red on the back of news that the company is to plug and abandon the Biawak Besar-1x exploration well in Indonesia.FTSE 250 - RisersElementis (ELM) 203.30p +4.85%Cable & Wireless Worldwide (CW.) 37.00p +4.34%Kenmare Resources (KMR) 50.65p +3.30%Ruspetro (RPO) 199.90p +2.78%Ferrexpo (FXPO) 295.70p +2.78%International Personal Finance (IPF) 256.00p +2.56%Oxford Instruments (OXIG) 1,195.00p +2.49%Rathbone Brothers (RAT) 1,294.00p +2.37%Diploma (DPLM) 435.30p +2.28%Yule Catto & Co (YULC) 239.70p +2.22%FTSE 250 - FallersKesa Electricals (KESA) 62.10p -4.68%Close Brothers Group (CBG) 739.50p -3.08%Dixons Retail (DXNS) 17.34p -3.07%Cape (CIU) 375.00p -2.90%Bumi (BUMI) 576.00p -2.78%Spirit Pub Company (SPRT) 52.75p -2.76%Exillon Energy (EXI) 127.30p -2.68%Fenner (FENR) 432.60p -2.57%Berkeley Group Holdings (The) (BKG) 1,315.00p -2.45%Home Retail Group (HOME) 105.40p -2.41%NR