Canaccord Genuity has upgraded Barclays from 'hold' to 'buy', hailing the bank's recent restructuring efforts.Analyst Arun Melmane said that plans, which include reducing the size of the investment bank to 30% of risk weighted assets from the current 51%, should contribute to a re-rating of the shares.Deutsche Bank has said that the best way to create value at BG Group is for the company to demerge its liquefied natural gas (LNG) operations. The bank has stuck with its 'buy' recommendation for the stock but raised its target price from 1,250p to 1,400p."With BG's Board intent on 'accelerating the creation and delivery of longer term value for shareholders' we have a proposal - demerge LNG. Effectively creating two smaller but focused businesses, BG E&P [exploration and production] and BG LNG."Investec has trimmed its target price for Marks & Spencer (M&S) ahead of the department store chain's first-quarter statement next month, but has kept a 'buy' rating on the stock, saying that its valuation remains "undemanding"."With increasingly more positive news coming through from other areas, we believe an inflection point is coming, with risk/reward on the upside."Numis Securities has repeated its 'buy' recommendation and 273p target price for IP Group after the latter's portfolio company reported positive results from a clinical trial.It said that if Diurnal commcercialises its Chronocort product, it would add £25-50m (5-10p a share) to IP Group's net asset value.BC