Rumours that serial insurance company raider Clive Cowdery is preparing a takeover bid for Legal & General(L&G) through his investment vehicle Resolution has lifted the sector higher. L&G leads the way, with sector peer Aviva not far behind.Mining stocks are lower as metals prices slip back. Platinum miner Lonmin, diversified group Xstrata and the Anglo-Australian giant Rio Tinto are among the fallers. Not all stocks in the sector are suffering. Base and precious metals explorer Baobab Resources has published preliminary details of a promising looking independent evaluation of the exploration potential of its Tete project in Mozambique.Top performing sectors so far todayLife Insurance 3,908.09 +2.67%Software & Computer Services 581.76 +1.86%Personal Goods 9,194.45 +1.47%Technology Hardware & Equipment 321.63 +1.41%General Retailers 1,638.50 +1.25%Bottom performing sectors so far todayAutomobiles & Parts 2,714.49 -1.36%Mobile Telecommunications 3,264.13 -1.33%Real Estate 2,036.84 -1.21%Mining 17,620.63 -1.13%Gas, Water & Multiutilities 3,745.01 -0.91%