Tuesday broker round-up UPDATE

Afren: Liberum Capital shifts target price from 123p to 130p maintaining a hold recommendation.Amara Mining: Numis initiates with a target price of 80p and a buy recommendation.APR Energy: Espirito Santo downgrades to sell with a target price of 680p.ASOS: Goldman Sachs increases target price from 3600p to 4150p and reiterates a strong buy recommendation.AstraZeneca: JP Morgan raises target price from 2750p to 3400p and upgrades to neutral.Berkeley Group: Goldman Sachs ups target price to 2507p, while downgrading from strong buy to buy.Carnival: Investec reduces target price from 300p to 2800p and retains a buy recommendation.Dignity: Investec takes target price from 1401p to 1424p, but downgrades from buy to add.Electrocomponents: Deutsche Bank raises target price from 205p to 230p retaining a hold recommendation.EnQuest: Liberum Capital moves target price from 153p to 167p and keeps a buy recommendation.Experian: JP Morgan ups target price from 1210p to 1347p, while its overweight rating remains unchanged.First Derivatives: Sanlem Securities raises target price from 605p to 700p and retains its buy recommendation.IMI: Jefferies increases target price from 930p to 1405p keeping a hold recommendation. Goldman Sachs moves target price from 1350p to 1400p, but downgrades to neutral.National Grid: Societe Generale ups target price from 634p to 674p, but retains a sell recommendation.Norcros: Numis upgrades to buy with target price of 20p.Ophir Energy: Credit Suisse reduces target price from 804p to 690p, while retaining an overweight rating.Petropavlovsk:JP Morgan takes target price from 420p to 460p and keeps an overweight rating.Premier Farnell: HSBC Holdings downgrades to neutral with a target price of 225p.QinetiQ: JP Morgan lowers target price from 210p to 205p retaining a neutral rating.RPC Group: JP Morgan shifts target price from 508p to 512p leaving its overweight rating unchanged.SIG: Jefferies ups target price from 137p to 185p and maintains a buy recommendation.Tate & Lyle: Exane BNP moves target price from 800p to 840p reiterating a neutral rating. Astrazeneca SIG Berkeley Group Tate & Lyle Experian Enquest ASOS IMI Norcros