Thursday broker round-up

BHP Billiton: Citigroup downgrades to Neutral with a target price of 1350p.

Spirent Communications: Jefferies upgrades to Buy with a target price of 145p.

Hastings Group: JPMorgan reiterates Neutral with a target price of 315p.

Rio Tinto: JPMorgan reiterates Overweight with a target price of 4000p.

Wizz Air: RBC reiterates Outperform with a target price of 3000p.

Horizon Discovery: RBC reiterates Sector Perform with a target price of 245p.

GlaxoSmithKline: Goldman Sachs reiterates Buy with a target price of 1900p.

Sophos Group: Morgan Stanley reiterates Overweight with a target price of 550p.

Virgin Money: Investec reiterates Buy with a target price of 390p.

Petra Diamonds: Canaccord reiterates Buy with a target price of 150p.