Friday broker round-up UPDATE

Antofagasta: Morgan Stanley cuts target price from 830p to 810p and maintains an underweight rating.ARM Holdings: Deutsche Bank raises target price from 470p to 1080p upgrading to buy.Aviva: Barcalys increases target price from 294.50p to 320p, while its underweight rating remains unaltered.Bwin.Party: Investec places its target price (prev.: 180p) under review, while its buy recommendation is kept.Cape: Investec reduces target price from 375p to 360p staying with its buy recommendation. JP Morgan lowers target price from 323p to 320p and keeps an overweight rating.Chime Communications: Investec ups target price from 300p to 335p and retains a buy recommendation.Computacenter: Investec raises target price from 550p to 575p reiterating its buy recommendation. Panmure Gordon increases target price from 473p to 504p and leaves its hold recommendation unchanged.Darty: Aplhavalue shifts target price from 74.90p to 74.60p downgrading from reduce to sell.DP World: HSBC takes target price from 975p to 1028p maintaining a neutral rating.GoldStone Resources: WH Ireland lowers target price from 9.70p to 5p and moves from buy to a speculative buy recommendation.G4S: Cantor Fitzgerald moves target price from 220p to 240p and reiterates a hold recommendation.Hansteen: Jefferies shifts target price from 88p to 90p keeping its hold recommendation.Hays: Numis ups target price from 100p to 140p and upgrades to buy.Imperial Tabacco: UBS reduces target price from 2660p to 2500p, while its buy recommendation remains unaltered.KWS: Numis initiates with a target price of 175p and an add rating.Lamprell: JP Morgan moves target price from 166p to 172p and leaves its neutral rating unchanged.Marshalls: Numis ups target price from 140p to 175p keeping an add rating. Panmure Gordon revises target price from 125p to 145p and retains a hold recommendation.Melrose: RBC Capital moves target price from 300p to 325p and maintains an outperform rating.Minera IRL: Fox Davies lowers target price from 48p to 36p, while staying with its buy recommendation.Pheonix Group Holdings: Morgan Stanley raises target price from 564p to 790p, while leaving its equal-weight rating unchanged.Polymetal International: Citi reduces target price from 698p to 612p and downgrades from neutral to sell.Publishing Technology: Westhouse Securities increases target price from 360p to 475p and reiterates a buy recommendation.Restaurant Group: Panmure Gordon ups target price from 560p to 600p and keeps its buy recommendation.Signet Jewelers: Deutsche Bank cuts target price from 4850p to 4700p retaining a hold recommendation.Sweett Group: Westhouse Securities moves target price from 50p to 58p and stays with its buy recommendation.WPP Group: Morgan Stanley takes target price from 1135p to 1235p reiterating an equal-weight rating. Investec increases target price from 1250p to 1325p and keeps its buy recommendation. Marshalls Hays Goldstone Resources Melrose Computacenter Antofagasta WPP