FTSE 250 peers Unite and Capital & Counties are providing a lift in the real estate investment and services sector after both companies saw positive net asset value (NAV) growth in 2010.Student accommodation manager Unite said adjusted fully diluted NAV per share rose 11% to 295p as it underlined its confidence in future trading with the reinstatement of a dividend payment this year.While property group Capital & Counties, which demerged from Liberty International last year, saw its diluted NAV rise by 17% to 148p, largely due to rising rental values in Convent Garden.The industrial transportation sector is in the red Wednesday, led by distribution group Wincanton, which said that results for the year ending 31 March are expected to be in line with expectations.The group highlighted debt reduction as its priority going forward to address challenging market conditions.Top performing sectors so far todayReal Estate Investment & Services 1,549.08 +1.02%Media 4,313.97 +0.77%Banks 4,866.98 +0.74%Mobile Telecommunications 4,017.33 +0.53%Alternative Energy 2,841.44 +0.21%Bottom performing sectors so far todayForestry & Paper 5,730.36 -3.27%Industrial Transportation 2,481.43 -2.95%Aerospace and Defence 3,214.37 -2.34%Construction & Materials 4,168.87 -2.29%General Industrials 3,186.51 -1.90%