BT is lifting the telecoms sector higher after announcing that it has sold part of its stake in the Indian IT Group Tech Mahindra. It also benefits from an upbeat broker note from Exane BNP Paribas, which lifts its price target on BT by 20% to 265p.Miners retreat in line with metal prices with India's Vedanta and South American copper group Antofagasta among the worst hit. Press speculation that China may take more steps next year to cool down its economy has made investors even less disposed to invest in mining stocks.Top performing sectors so far todayFixed Line Telecommunications 2,232.44 +4.21%Health Care Equipment & Services 3,368.94 +1.85%Construction & Materials 3,629.14 +1.70%Pharmaceuticals & Biotechnology 9,059.29 +1.20%Industrial Engineering 6,390.73 +1.07%Bottom performing sectors so far todayLife Insurance 3,777.68 -1.77%Banks 4,727.42 -1.64%Mining 25,267.15 -1.57%Forestry & Paper 5,252.11 -1.16%Chemicals 6,332.38 -1.13%