Mining companies - sensitive to swings in the global economic outlook - were heading north after markets were buoyed by the news that European Union finance ministers agreed on a plan for the co-ordinated recapitalistion of finance institutions. Xstrata, Vedanta Resources, Kazakhmys, Rio Tinto and BHP Billiton were among the best performers.Meanwhile, the big announcements of the day came from supermarket rivals Sainsbury and Tesco, who were both making gains in the afternoon.Despite falling early on, Tesco edged mildly higher. While like-for-like (LFL) sales (excluding VAT and petrol) fell by 0.5% in the first half, total sales grew by 8.8%. Rival supermarket Sainsbury made good gains after announcing that revenues grew 7.6% in the first half, as sales growth accelerated in the second quarter. FTSE 100 - RisersWolseley (WOS) 1,640.00p +8.18%Xstrata (XTA) 821.60p +7.54%Aviva (AV.) 296.00p +7.52%Vedanta Resources (VED) 1,018.00p +7.38%Legal & General Group (LGEN) 96.25p +7.18%Kazakhmys (KAZ) 782.00p +7.12%Burberry Group (BRBY) 1,190.00p +6.92%Rio Tinto (RIO) 2,899.00p +6.88%Barclays (BARC) 154.25p +6.86%BHP Billiton (BLT) 1,778.50p +6.69%FTSE 100 - FallersInmarsat (ISAT) 449.80p -4.99%Kingfisher (KGF) 235.20p -2.00%Next (NXT) 2,463.00p -1.64%Marks & Spencer Group (MKS) 309.10p -1.18%Severn Trent (SVT) 1,515.00p -0.98%United Utilities Group (UU.) 615.00p -0.97%Associated British Foods (ABF) 1,090.00p -0.91%International Power (IPR) 310.70p -0.54%Imperial Tobacco Group (IMT) 2,129.00p -0.51%Autonomy Corporation (AU.) 2,549.00p -0.04%NR