Tuesday broker round-up

Ashtead Group: Jefferies raises target price from 1185p to 1250p, maintaining a 'buy' recommendation.

Assura Group: Liberum downgrades to 'hold' with a target price of 50p.

AstraZeneca: Exane initiates with a target price of 5500p and keeps an 'outperform' rating.

Atkins (WS): Canaccord increases target price from 1400p to 1500p and keeps a 'buy' recommendation.

Aviva: Deutsche Bank raises target price from 545p to 620p and upgrades to 'buy'.

Babcock: Canaccord initiates with a target price of 1400p and a 'buy' recommendation.

Balfour Beatty: Canaccord initiates with a target price of 185p and a 'hold' recommendation.

BHP Billiton: JP Morgan cuts target price from 2080p to 2050p and retains a 'neutral' rating.

Big Yellow Group: Citi ups target price from 540p to 555p and reiterates its 'neutral' rating.

Bunzl: Canaccord increases target price from 1750p to 1855p and maintains its 'buy' recommendation.

Carillion: Canaccord initiates with a target price of 394p and a 'buy' recommendation.

Chamberlin: FinnCap places its target price (prev.: 100p) under review, retaining its 'buy' recommendation.

Chemring: Investec upgrades from 'add' to 'buy' with a target price of 250p.

Daily Mail & General Trust: Liberum reduces target price from 1155p to 900p, while keeping its 'buy' recommendation.

De La Rue: Investec cuts target price from 600p to 560p, while upgrading from 'hold' to 'add'.

Experian: Canaccord shifts target price from 928p to 929p and retains its 'hold' recommendation.

GlaxoSmithKline: Exane initiates with a target price of 1330p and an 'underperform' rating.

Greencore: Investec places its target price (prev.: 275p), while staying with its buy recommendation.

G4S: Canaccord moves target price from 300p to 313p and reiterates a 'buy' recommendation.

Hutchison China MediTech: UBS raises target price from 1200p to 1590p and reiterates a 'buy' recommendation.

Immunodiagnostic Systems: N+1 Singer downgrades from 'hold' to 'sell' with a target price of 295p.

Interserve: Canaccord initiates with a target price of 600p and a 'hold' recommendation.

Ithaca Energy: Investec lowers target price from 140p to 135p, while reiterating its 'buy' recommendation.

Kier Group: Canaccord initiates with a target price of 2000p and a 'buy' recommendation.

Lonmin: JP Morgan ups target price from 260p to 280p and reiterates an 'overweight' rating.

Mears: Canaccord cuts target price from 490p to 400p and stays with its 'hold' recommendation.

Mitie Group: Canaccord cuts target price from 350p to 320p and leaves its 'buy' recommendation unchanged.

Petrofac: Credit Suisse reduces target price from 1250p to 960p and downgrades to 'neutral'. Nomura reduces target price from 1000p to 800p, while maintaining a 'neutral' rating. Deutsche Bank cuts target price from 1200p to 1050p and downgrades to 'hold'. Canaccord reduces target price from 1400p to 1150p, while staying with its'buy' recommendation. Investec reduces target price from 1290p to 900p and downgrades from 'buy' to 'hold'.

Reckitt Beckiser: Citi reduces target price from 6000p to 5800p and retains a 'buy' recommendation. Charles Stanley downgrades to hold.

Reed Elsevier: JP Morgan increases target price from 1020p to 1125p and stays with its 'overweight' rating.

Royal Mail: Investec cuts target price from 430p to 400p and downgrades from 'hold' to 'reduce'.

Sanderson: WH Ireland shifts target price from 81p to 83p and keeps its 'buy' recommendation.

Scapa: Numis upgrades from 'add' to 'buy' with a target price of 156p.

Schroders: Morgan Stanley raises target price from 2890p to 3070p and reiterates an 'overweight' rating.

Sirius Petroleum: Cantor lowers target price from 7.5p to 5.5p, while staying with its 'buy' recommendation.

Spirent: UBS cuts target price from 103p to 75p, maintaining its 'neutral' rating.

Thalassa Holdings: WH Ireland reduces target price from 260p to 118p, while leaving its 'buy' recommendation unchanged.

Ultra Electronics: UBS reduces target price from 1940p to 1780p and keeps a 'neutral' rating.