Broker tips: Rolls-Royce, BG Group, Micro Focus, SuperGroup

Investec has kept a 'buy' rating for Rolls-Royce, labelling the engineer as a "shareholder-friendly diversified financial" after a potential £1bn share buyback was announced on Thursday."We do not believe the share buyback was expected by investors and, as such, we think it is likely to be taken very positively," Investec said.Credit Suisse has downgraded BG Group from 'neutral' to 'underperform', saying it sees "weak spots in BG's defence line".The bank expects 2015 to be "another challenging year" for BG with risks to its liquefied natural gas (LNG) operations.Numis Securities has upgraded its forecast for Micro Focus after the software group beat guidance and analysts' forecasts on Thursday.While the broker has lowered its recommendation for the stock from 'buy' to 'add', it still said that the "rating is not demanding and we see room for further good upside". It left its 920p target price unchanged.Canaccord Genuity still recommends investors to 'buy' shares of SuperGroup despite the recent sell-off, with the broker saying that the "brand [is] still in fashion, even if shares aren't"."With no change to the medium-term growth outlook, and the internal problems of the past now well behind the company, the share price offers an excellent entry point for any investors who missed the ramp up off the 2012 low."BC Rolls-Royce