Tuesday broker round up

(Sharecast News) - Aston Martin Lagonda: Goldman Sachs downgrades to neutral with a target price of 520p.

Derwent London: Peel Hunt reiterates hold with a target price of 3,100p.

Hammerson: Peel Hunt reiterates add with a target price of 300p.

Rio Tinto: Goldman Sachs reiterates buy with a target price of 4,900p.

Assura: Barclays initiates at overweight with a target price of 81p.

Primary Health Properties: Barclays initiates with a recommendation to overweight with a target price of 160p.

Auto Trader: UBS upgrades to neutral with a target price of 560p.

Ferguson: Liberum downgrades to hold with a target price of 7,000p.

Rightmove: Goldman Sachs upgrades to neutral with a target price of 653p.

Diageo: RBC Capital Markets upgrades to outperform with a target price of 3,500p.

Serco Group: JP Morgan upgrades to overweight with a target price of 170p.

Go-Ahead: Canaccord downgrades to hold with a target price of 2,200p.