Technology and mining firms are dominating Footsie today. Search software provider Autonomy Corporation is the best performer even though there are concerns that its growth rate is slowing. Broker Peel Hunt is cautious about Autonomy's future and points out that there is a risk that 2011 forecasts may have to be downgraded. Chip designer ARM is riding the wave of increased demand for mobile devices. Full year profit rose by 73% to £167.4m in 2010. ARM is another highly rated company that needs to keep growing rapidly to warrant its valuation. Strong growth in Chinese manufacturing has boosted mining companies, including Antofagasta and Kazakhmys. BP has fallen back even though it has restored its dividend. InterContinental Hotels continues to fall on the back of concerns about Egypt. FTSE 100 - Risers Autonomy Corporation (AU.) 1,595.00p +6.62%Antofagasta (ANTO) 1,475.00p +4.91%Kazakhmys (KAZ) 1,563.00p +3.78%Legal & General Group (LGEN) 115.10p +3.69%Johnson Matthey (JMAT) 1,996.00p +3.69%Fresnillo (FRES) 1,335.00p +3.01%Petrofac Ltd. (PFC) 1,613.00p +3.00%ARM Holdings (ARM) 531.50p +3.00%International Consolidated Airlines Group SA (IAG) 263.70p +2.85%Eurasian Natural Resources Corp. (ENRC) 1,034.00p +2.68%FTSE 100 - Fallers BAE Systems (BA.) 333.80p -2.40%Smiths Group (SMIN) 1,334.00p -1.91%InterContinental Hotels Group (IHG) 1,298.00p -1.29%Compass Group (CPG) 549.00p -1.17%Wolseley (WOS) 2,152.00p -1.15%G4S (GFS) 265.90p -1.01%Invensys (ISYS) 332.90p -0.98%Tesco (TSCO) 399.85p -0.71%Rolls-Royce Group (RR.) 634.00p -0.63%BP (BP.) 482.80p -0.42%