Thursday broker round-up UPDATE

ASOS: Goldman Sachs reduces target price from 7300p to 6250p, while upgrading to buy.BTG: N+1 Singer shaves target price from 488p to 486p retaining a sell recommendation.EKF Diagnostics: FinnCap initiates with a target price of 38p and a buy recommendation.Exova Group: Credit Suisse starts with a target price of 255p and an outperform rating.Great Portland Estates: Exane ups target price from 760p to 780p maintaining its outperform rating.Hogg Robinson Group: Investec raises target price from 95p to 110p reiterating a buy recommendation.Lekoil: Westhouse Securities increases target price from 62p to 86p and upgrades from add to buy.Prudential: Goldman Sachs downgrades from strong buy to buy with a target price of 1580p.QinetiQ: Investec places both its target price (prev.: 250p) and its buy recommendation under review.3i Group: Citi ups target price from 410p to 430p and maintains a buy recommendation. Prudential BTG ASOS Ekf Diagnostics 3i Group