Thursday broker round-up

Aviva: Nomura cuts target from 600p to 540p, buy rating unchanged.Babcock: Panmure Gordon downgrades from buy to hold, target left at 940p.BG Group: Jefferies reiterates buy stance and 2,000p target.BHP Billiton: Credit Suisse maintains outperform rating and 2,460p target.BT Group: Nomura keeps buy rating and 295p target.Capita: Panmure Gordon upgrades from sell to hold, target lifted from 560p to 600p.Fiderweb: Peel Hunt initiates coverage with buy rating and 80p target.Fuller Smith & Turner: Peel Hunt keeps buy rating and 790p target; Panmure Gordon keeps hold rating and 735p target.G4S: Panmure Gordon reiterates buy rating and 330p target.Halfords: Peel Hunt downgrades from hold to sell, target cut from 320p to 240p; Panmure Gordon cuts target from 375p to 315p, keeps buy rating.Home Retail: Panmure Gordon cuts target from 60p to 51p, sell rating unchanged.Kingfisher: Panmure Gordon keeps buy rating and 350p target.Logica: Peel Hunt downgrades from buy to hold, target raised from 95p to 105p; Merchant Securities give hold rating, puts 80p target under review; Panmure Gordon raises target from 86p to 105p, buy rating unchanged.Premier Oil: UBS upgrades from neutral to buy, target reduced from 430p to 410p.Prudential: Nomura reiterates reduce rating and 740p target; Panmure Gordon keeps buy rating and 960p target.Royal Bank of Scotland: AlphaValue upgrades from add to buy, target cut from 24.9p to 24.7p.SABMiller: Nomura keeps neutral stance and 2,600p target.Serco: Pnamure Gordon raises target from 600p to 630p, buy rating unchanged.Tate & Lyle: Jefferies keeps hold recommendation and 690p target; Panmure Gordon keeps hold recommendation and 690p target.Thomas Cook: Peel Hunt retains sell recommendation and 10p target; Panmure Gordon keeps sell rating and 10p target.Xchanging: Panmure Gordon downgrades from hold to sell, target cut from 90p to 75p.BC