Nationalised lender Royal Bank of Scotland (RBS) was a high riser after its first-quarter results. The group is to repay the final tranche of notes issued under the government's Credit Guarantee Scheme (CGS) next week, after posting a profit of more than a billion pounds in the first three months of 2012. Lloyds was also in demand. Drugs giant AstraZeneca was also making gains after UBS reiterated its buy rating on the stock and added it to the 'UBS Key Calls' list. "With the announcement that CEO Brennan is retiring and new chairman Johansson is starting on June 1st, we increasingly see the likelihood of strategic announcements in 2012 that would unleash value in AZN shares," the broker said.Morrisons was also heading higher as it recovered from yesterday's news that it had made its first loss since its Safeways takeover in 2004. ??Meanwhile, mining stocks were out of favour on the back of concerns over weaker growth in Australia. Kazakhmys, Evraz, Antofagasta, Vedanta, Fresnillo and Rio Tinto were among the worst performers on the Footsie. ?? Although not in the bottom 10, oil giant Tullow also dropped after saying that its Teak-4A appraisal well in the West Cape Three Points Block, offshore Ghana (in which it owns a 26.4% stake), encountered "thin, non-commercial reservoirs" and is consequently being plugged and abandoned. ?? Power systems group Rolls-Royce fell after giving a brief update this morning, reassuring that trading since the start of the year has been consistent with previous guidance. FTSE 100 - RisersLloyds Banking Group (LLOY) 32.69p +3.29%Royal Bank of Scotland Group (RBS) 25.12p +2.32%Tesco (TSCO) 321.00p +0.88%ARM Holdings (ARM) 518.00p +0.78%AstraZeneca (AZN) 2,741.50p +0.51%United Utilities Group (UU.) 632.00p +0.48%SSE (SSE) 1,336.00p +0.30%RSA Insurance Group (RSA) 105.40p +0.29%Morrison (Wm) Supermarkets (MRW) 277.20p +0.25%BT Group (BT.A) 216.30p +0.19%FTSE 100 - FallersKazakhmys (KAZ) 786.00p -4.73%Evraz (EVR) 344.00p -4.60%GKN (GKN) 196.40p -4.15%Eurasian Natural Resources Corp. (ENRC) 531.50p -3.89%Vedanta Resources (VED) 1,137.00p -3.64%Xstrata (XTA) 1,126.50p -3.55%Antofagasta (ANTO) 1,069.00p -3.52%Glencore International (GLEN) 411.60p -3.47%Amec (AMEC) 1,091.00p -3.45%BG Group (BG.) 1,375.50p -3.44%NR