Monday broker round-up UPDATE

Admiral Group: Credit Suisse reduces target price from 1425p to 1350p and stays with its neutral rating.Ophir Energy: RBC Capital reduces target price from 400p to 240p, while its neutral rating remains unchanged.Petra Diamonds: Westhouse Securities ups target price from 200p to 230p upgrading from neutral to add.Prudential: Deutsche Bank raises target price from 1585p to 1630p maintaining a buy recommendation.Rentokil Initial: Investec ups target price from 100p to 150p and upgrades from hold to buy.River and Mercantile Group: Canaccord Genuity initiates with a target price of 231p and a buy recommendation.SIG: Berenberg lowers target price from 230p to 215p and stays with its buy recommendation.Travis Perkins: Liberum Capital reduces target price from 2190p to 2100p, while retaining a buy recommendation.UDG Healthcare: Investec shifts target price from 360p to 365p keeping a hold recommendation.Vesuvius: Investec places both its target price (prev.: 465p) and its add rating under review. Admiral Prudential SIG Petra Diamonds Travis Perkins Rentokil Initial Vesuvius