AstraZeneca: Morgan Stanley increases target price from 4100p to 4300p, while downgrading to 'underweight'.BG Group: Barclays reduces target price from 1300p to 1100p and reiterates an 'equal-weight' rating. Credit Suisse reduces target price from 1050p to 940p and maintains an 'underperform' rating.COLT Telecom: Nomura cuts target price from 140p to 118p and downgrades to 'reduce'.Conygar: Liberum shifts target price from 200p to 203p and keeps a 'buy' recommendation.Hochschild Mining: RBC cuts target price from 140p to 120p, staying with its 'neutral' rating.Just Eat: Citi initiates with a target price of 495p and a 'buy' recommendation.Merlin Entertainments: JP Morgan shifts target price from 435p to 440p and reiterates an 'overweight' rating. Deutsche Bank moves target price from 430p to 440p and retains its 'buy' recommendation.Royal Dutch Shell: Barclays reduces target price from 2950p to 2850p and keeps an 'overweight' rating.SAB Miller: Goldman Sachs reduces target price from 4350p to 3900p, downgrading to a 'strong buy' recommendation..Shire: Morgan Stanley raises target price from 4700p to 5200p and keeps an 'overweight' rating.Stellar Diamonds: Sanlam shifts target price from 1.8p to 2.25p and maintains a 'buy' recommendation.Talk Talk Telecom: Nomura cuts target price from 275p to 240p and downgrades to 'reduce'.Vodafone: Nomura moves target price from 180p to 190p and keeps a 'reduce' rating.