BHP Billiton: Credit Suisse reiterates underperform recommendation and 1,350p target.Henderson Group: Credit Suisse stays at underperform.Anite: Panmure Gordon keeps at buy.Kingfisher: Bank of America-Merrill Lynch upgrades to neutral from underperform.Tullow Oil: Cantor Fitzgerald initiates at sell.Royal Mail: JP Morgan Cazenove shaves target to 515p from 535p and reiterates neutral recommendation.BT Group: RBC continues to rate at outperform with 550p target.SSE: RBC reiterates underperform recommendation with 1,500p target.Berkeley Group: Deutsche Bank ups target to 3,474p from 3,471p and stays at hold.United Utilities: Deutsche Bank stays at buy and raises target to 1,110p from 1,040p.Severn Trent: Deutsche Bank keeps at buy and ups target to 2,350p from 2,200p.Pennon: Deutsche Bank raises target to 880p from 850p and remains at hold.Kaz Minerals: Deutsche Bank trims target price to 330p from 340p but remains at buy.