Chip giant ARM Holdings is the best performer on the FTSE 100, boosted by last night's bullish report by US peer Intel, which predicted that second quarter sales will come in at about $12.8bn (give or take $500m), ahead of analysts' estimates. Copper and gold prices have boosted the miners, with Xstrata among the best performers. The group has been lifted higher after being upgraded to 'overweight', from 'neutral', by JP Morgan Cazenove.Also being aided by a broker upgrade is banking titan HSBC, which is performing well after its rating was upped from 'equal-weight' to 'overweight' by Morgan Stanley.Miner BHP Billiton is wanted after it enjoyed record iron ore production and sales in the first nine months of its financial year. Business and academic publisher Reed Elsevier is leading the fallers despite reporting yesterday that it saw growth across the board.Reckitt Benckiser, the household products company behind Cillit Bang, issued a statement at noon, saying it got off to a strong start to 2011. ---bcFTSE 100 - RisersARM Holdings (ARM) 605.00p +5.13%GKN (GKN) 205.50p +4.85%Kingfisher (KGF) 277.70p +3.97%Royal Dutch Shell 'B' (RDSB) 2,247.00p +3.91%Wolseley (WOS) 2,157.00p +3.85%Weir Group (WEIR) 1,820.00p +3.59%Xstrata (XTA) 1,510.50p +3.57%BP (BP.) 468.60p +3.56%Royal Dutch Shell 'A' (RDSA) 2,261.50p +3.41%Reckitt Benckiser Group (RB.) 3,284.00p +3.37%FTSE 100 - FallersReed Elsevier (REL) 528.00p -1.77%Legal & General Group (LGEN) 115.30p -1.20%Resolution Ltd. (RSL) 289.60p -0.96%BAE Systems (BA.) 324.80p -0.49%Smith & Nephew (SN.) 676.00p -0.07%SABMiller (SAB) 2,222.00p +0.09%Rolls-Royce Group (RR.) 630.00p +0.32%Essar Energy (ESSR) 440.00p +0.41%Autonomy Corporation (AU.) 1,504.00p +0.47%Lloyds Banking Group (LLOY) 58.67p +0.50%