Footsie is moving ahead today thanks to a wide range of companies. Chip designer ARM is clawing back some of its recent losses.Vodafone has spent another £21.7m on buying back shares. That takes the total spent since 16 September to £464.5m. The share price has risen by more than 8% in the past month.Moody's has changed its rating on 3i from negative to stable due to the reduction of its borrowings. Revenue jumped 30% at Aggreko on a constant currency basis during the third quarter, and the temporary power and temperature control expert now thinks full-year profit will beat consensus forecasts. It predicts 2010 profits of around £300m, better than the current consensus of £290m. Panmure Gordon has upgraded its 2011 profit forecast from £300m to £305m. Despite that Aggreko is the biggest loser in the index because of high investor expectations. Figures from AstraZeneca were slightly below some of the more optimistic expectations and gross margins were fell. There was a $128m charge relating to the discontinuation of the development of one of its treatments. GlaxoSmithKline is lower even though its Indian subsidiary reported better than expected earnings. FTSE 100 - RisersARM Holdings (ARM) 372.80p +3.44%Vodafone Group (VOD) 171.60p +3.19%Standard Chartered (STAN) 1,821.50p +2.62%Schroders (SDR) 1,563.00p +2.49%3i Group (III) 299.80p +2.46%Prudential (PRU) 628.00p +2.36%Schroders (Non-Voting) (SDRC) 1,256.00p +2.36%Rolls-Royce Group (RR.) 643.50p +2.22%Inmarsat (ISAT) 649.50p +1.88%International Power (IPR) 415.80p +1.79%FTSE 100 - FallersAggreko (AGK) 1,575.00p -5.23%AstraZeneca (AZN) 3,137.50p -3.33%Weir Group (WEIR) 1,545.00p -2.22%Smith & Nephew (SN.) 566.50p -1.22%Invensys (ISYS) 297.20p -0.80%GlaxoSmithKline (GSK) 1,234.50p -0.80%Compass Group (CPG) 516.00p -0.77%Xstrata (XTA) 1,254.50p -0.75%Barclays (BARC) 280.50p -0.64%Lloyds Banking Group (LLOY) 68.84p -0.41%