Friday broker round-up UPDATE

African Minerals: Investec reduces target price from 393p to 246p, while its buy recommendation remains unchanged.Ashmore Group: Berenberg cuts target price from 500p to 470p and retains a buy recommendation.ASOS: Deutsche Bank raises target price from 4450p to 4800p and reiterates a hold recommendation.Caretech: Panmure Gordon ups target price from 230p to 285p keeping a buy recommendation.Centaur Media: Westhouse Securities moves target price from 38p to 45p and upgrades to add.Escher Group Holdings: Panmure Gordon takes target price from 467p to 488p and maintains a buy recommendation.Halfords Group: Citi increases target price from 325p to 465p and upgrades from neutral to buy.ICAP: Bank of America cuts target price from 450p to 425p downgrading to neutral.Keywords Studios: Numis reduces target price from 175p to 150p downgrading to add.Partnership Assurance Group: Nomura initiates with a target price of 523p and a buy recommendation.Premier Farnell: Deutsche Bank shifts target price from 250p to 245p keeping a buy recommendation. Numis downgrades to hold with a target price of 250p.Prudential: Alphavalue lowers target price from 1043.90p to 1042.50p and downgrades from reduce to sell.Royal Bank of Scotland: Investec shifts target price from 340p to 345p, but still recommends selling.Sainsbury: Citi ups target price from 350p to 400p upgrading from sell to neutral.Vectura Group: Numis downgrades to add with a target price of 135p.Weatherly International: Canaccord Genuity shifts target price from 8p to 9p and maintains a buy recommendation.Workspace Group: Panmure Gordon raises target price from 375p to 460p upgrading from hold to buy. Prudential Workspace Halfords Ashmore Group Weatherly International Plc ASOS Sainsbury's