Barclays shares dropped five per cent after Qatar disposed of its remaining warrants in the bank, pulling the entire banking sector lower. Even a boost from JP Morgan, which raised its target price from 250p to 320p and upgraded the stock to overweight, was not enough to stop the group from falling. The transaction, which is expected to yield a $280m profit for Qatar, saw both Deutsche Bank AG and Goldman Sachs agree to sell as many at 303.3m shares, equal to £740m, at 244p a time. Although the conversion of the warrants would provide Barclays with £750m, it would dilute other investors' holding in the group. Originally, the warrants formed part of a deal with Qatar investors in an attempt to avoid taking emergency funding for the UK's government. Meanwhile, Tobacco was the biggest riser of the sectors, although gains were limited. Typically 'safe haven' stocks, British American Tobacco and Imperial Tobacco Group, were both given a boost by the decline seen in banks and across the FTSE in general. Top performing sectors so far todayTobacco 37,194.58 +0.82%Food Producers & Processors 6,358.78 +0.33%Personal Goods 19,576.52 +0.22%Real Estate Investment & Services 1,835.82 +0.16%Gas, Water & Multiutilities 5,216.36 +0.13%Bottom performing sectors so far todayBanks 4,226.32 -1.61%Oil Equipment, Services & Distribution 24,037.06 -1.25%Construction & Materials 3,124.83 -1.23%Industrial Metals & Mining 2,479.21 -1.22%Industrial Transportation 2,306.28 -1.12%