Tuesday broker round-up UPDATE

AG Barr: Investec increases target price from 562p to 591p, while downgrading from buy to add. Canaccord Genuity downgrades to hold with a target price of 570p.Amara Mining: Cantor Fitzgerald cuts target price from 81p to 63p and retains a buy recommendation.Compass Group: Nomura ups target price from 915p to 1055p and maintains its buy recommendation.Darty: Bank of America moves target price from 50p to 58p retaining an underperform rating.Dixons Retail: Bank of America shifts target price from 40p to 45p and reiterates a neutral rating.Global Petroleum: Northland Capital cuts target price from 18.10p to 13p, while keeping a buy recommendation.Hellermann Tyton Group: Numis initiates with a target price of 270p to and an add rating.Inchcape: Bank of America increases target price from 550p to 600p and leaves its buy recommendation unchanged.Investec: Citi takes target price from 525p to 540p keeping a buy recommendation.GlaxoSmithKline: Deutsche Bank raises target price from 1620p to 1930p upgrading to buy.Lloyds Banking Group: Citi downgrades to neutral with a target price of 62p.London Stock Exchange Group: Espirito Santo ups target price from 1315p to 1718p and keeps a buy recommendation.LSL Property Services: Numis increases target price from 330p to 420p and reiterates an add rating.Marks & Spencer: Bank of America raises target price from 450p to 525p maintaining a buy recommendation.QinetiQ: Investec shifts target price from 195p to 190p and reiterates a hold recommendation.Renold: N+1 Singer upgrades to hold with a target price of 20p.Royal Bank of Scotland: Citi downgrades to sell with a target price of 290p.SABMiller: Credit Suisse reduces target price from 4000p to 3920p, while keeping its outperform rating.Sainsbury: Bank of America moves target price from 335p to 363p, while retaining an underperform rating.Smiths Group: Morgan Stanley ups target price from 1281p to 1318p and keeps an equal-weight rating.SuperGroup: Bank of America takes target price from 800p to 900p and stays with its buy recommendation.Tesco: Bank of America increases target price from 363p to 390p reiterating a neutral rating.Treatt: Investec takes target price from 470p to 610p retaining a buy recommendation.Volex Group: Investec moves target price from 105p to 120p and upgrades from hold to buy.