Following last week's Burberry management roadshow in New York, Credit Suisse has maintained its 'outperform' rating and 1,430p target price for the luxury brand group.The broker said that the meeting "reinforced our belief that Burberry's brand elevation and leading digital media story remains intact".Panmure Gordon has upgraded its rating for security solutions group G4S from 'hold' to 'buy', saying that the stock could rebound following recent underperformance."We think there is scope for the shares to recover back to its pre-Olympic peak, and do not subscribe to the view that the UK Government outsourcing market is firmly shut for the company," the broker said. "As the outsourcing sector has continued to re-rate, G4S has stood still presenting an attractive entry point heading into 2013E in our view."Cairn Energy shares were performing well on Tuesday morning, helped by a ratings upgrade by UBS from 'neutral' to 'buy'.Following a 12% fall for the shares in 2012 so far, UBS said it sees an "excellent entry point" on a longer-term horizon with downside looking well protected.BC