The personal goods sector was hammered today after heavyweight constituent Burberry disappointed the market with its first-quarter trading statement.The luxury brand group said that underlying sales growth was just 11% in the first quarter of 2012, down from 15% in the fourth quarter of 2011. The stock, came close to the 1,600p mark in April has declined steadily over recent months and was trading at 1,284p yesterday. Today's update however took nearly 8% off the group's market capitalisation, with the share price standing at 1,184p before the close.First-quarter sales were around 2% below consensus forecasts with retail comparable store sales growth coming in at 6% compared with last year's 15%, according to Nomura which lowered its price target for the stock from 1,530p to 1,450p.Elsewhere, the chemicals sector was reacting badly to a research report by UBS, which downgraded the ratings of sector peers Croda International and Johnson Matthey. The move was purely on a valuation basis, the broker explained, saying that there's "little value left in crowded defensives."Top performing sectors so far todayMobile Telecommunications 4,264.91 +1.35%Real Estate Investment Trusts 2,038.47 +0.55%Construction & Materials 3,379.25 +0.32%Fixed Line Telecommunications 2,557.11 +0.28%Oil & Gas Producers 8,107.08 +0.27%Bottom performing sectors so far todayPersonal Goods 18,571.01 -6.16%Industrial Transportation 2,262.03 -2.92%Automobiles & Parts 4,905.26 -2.65%Electronic & Electrical Equipment 3,131.62 -2.50%Chemicals 7,706.02 -2.48%BC