Building materials group Wolseley rebounded Wednesday, a day after shares took a hammering when investors noted a slight slowdown in the US and ongoing weakness in Europe.Investors today seems to take greater notice of the group's 7.9% rise in third quarter trading profits to £150m, reported yesterday.Sage Group, which develops business management software, advanced despite recent ratings downgrades on the company's stock.Engineering giant Rolls-Royce rallied after announcing it has signed £3.0m worth of new contracts to provide machinery for Viking Cruises' ships.Aberdeen Asset Management, on the other hand, saw its shares plunge after its Chief Investment Officer, Anne Richards, offloaded 1.4m shares in the company and UBS removed the stock from its 'preferred' list. National Grid retreated following reports of infrastructure issues and the impact of having gone "ex-dividend". Tesco slumped after the supermarket chain reported a 2.2% like-for-like fall in first quarter sales. FTSE 100 - RisersWolseley (WOS) 3,176.00p +0.99%Sage Group (SGE) 355.10p +0.28%Rolls-Royce Holdings (RR.) 1,192.00p +0.17%William Hill (WMH) 432.60p +0.14%BT Group (BT.A) 296.40p 0.00%Serco Group (SRP) 610.00p 0.00%Severn Trent (SVT) 2,030.00p -0.10%Centrica (CNA) 370.90p -0.13%Smith & Nephew (SN.) 754.00p -0.20%London Stock Exchange Group (LSE) 1,400.00p -0.28%FTSE 100 - FallersAberdeen Asset Management (ADN) 439.90p -5.17%National Grid (NG.) 751.50p -4.93%Tesco (TSCO) 347.55p -4.64%Fresnillo (FRES) 1,123.00p -3.61%Schroders (SDR) 2,282.00p -3.47%Aggreko (AGK) 1,629.00p -3.44%Standard Life (SL.) 380.10p -3.01%Marks & Spencer Group (MKS) 452.60p -2.94%Old Mutual (OML) 199.90p -2.77%Standard Chartered (STAN) 1,500.50p -2.72%RD