JJB Sports is leading the retail sector lower. The sportswear and equipment retailer reported a 29% decline in underlying sales and remains cautious about Christmas and New Year trading.However, it's not all bad news on the retail front. Car dealer Inchcape is higher after saying it expects 2009's performance to be slightly ahead of expectations.TV and internet shopping channel operator Ideal Shopping Direct posts good gains after it said trading in the final quarter was ahead of internal forecasts.Automotive and aerospace engineer GKN motors higher again, helping lift the automobiles and parts sector higher. The company said yesterday that overall demand has been better than predicted at its last update in October and expects to make further "significant" progress in 2010.Top performing sectors so far todayIndustrial Metals 4,724.17 +0.78%Industrial Transportation 1,937.50 +0.71%Automobiles & Parts 2,672.41 +0.62%Construction & Materials 3,245.35 +0.55%Industrial Engineering 3,809.74 +0.47%Bottom performing sectors so far todayBanks 4,726.24 -2.28%Mining 20,570.65 -1.75%Life Insurance 3,789.65 -1.38%Personal Goods 10,308.61 -1.26%General Retailers 1,743.06 -1.25%