Mining stocks were making decent gains as metals prices improved. ENRC was the standout performer on the back of reports Suleiman Kerimov, the Russian billionaire, has increased his stake in the miner. Also on the rise was newly merged commodities trader and mining giant Glencore Xstrata on its first day of trading. EVRAZ, Antofagasta, Rio Tinto and BHP Billiton were also in demand. Heading the other way was RBS after its first-quarter results. 'Clean' profit before tax, which excludes one-off costs, came in at £829m in the three months to the end of March, up from £553m recorded in the fourth quarter, but well below the consensus estimate of £1,200m. Sector peer Lloyds, HSBC and Standard Chartered fell in sympathy. Drugmaker Shire was extending losses after missing sales forecasts with its first-quarter figures yesterday. UBS cut its target price for the stock today from 2,400p to 2,300p but kept its' buy' rating. FTSE 100 - RisersEurasian Natural Resources Corp. (ENRC) 282.90p +7.81%Antofagasta (ANTO) 977.50p +7.12%Evraz (EVR) 158.50p +6.52%Glencore Xstrata (GLEN) 351.10p +6.02%Rio Tinto (RIO) 3,050.00p +4.99%Polymetal International (POLY) 738.50p +4.90%Tullow Oil (TLW) 1,022.00p +4.61%Wood Group (John) (WG.) 801.50p +4.57%Prudential (PRU) 1,168.00p +4.47%Anglo American (AAL) 1,631.00p +4.02%FTSE 100 - FallersRoyal Bank of Scotland Group (RBS) 293.90p -4.36%Reckitt Benckiser Group (RB.) 4,640.00p -0.79%Randgold Resources Ltd. (RRS) 5,080.00p -0.78%Shire Plc (SHP) 1,871.00p -0.74%Babcock International Group (BAB) 1,073.00p -0.56%BT Group (BT.A) 277.70p -0.50%GlaxoSmithKline (GSK) 1,649.50p -0.45%Associated British Foods (ABF) 1,932.00p -0.41%Imperial Tobacco Group (IMT) 2,361.00p -0.38%RSA Insurance Group (RSA) 111.20p -0.36%NR