Nomura has reiterated its 'buy' rating and 280p target price for telecoms group BT Group, saying that the firm's third-quarter results have reversed recent negative revenue momentum.The broker noted that BT has improved its underlying growth (excluding transit) rate from -5.5% to -3.1% in the quarter ended December 31st, "backed up by a range of robust, if not exceptional, operational key performance indicators".UBS lowered its rating for oil major Royal Dutch Shell from 'buy' to 'neutral' on Friday, citing an absence of near-term momentum. "A 4Q miss versus UBSe and consensus and no near-term prospect of an improvement in the main drag on performance - the North American upstream business - prompt us to cut 2013/14E earnings per share by an average 10%, and to cut our recommendation to 'neutral'," the broker said.Panmure Gordon has kept its 'sell' rating for travel and leisure firm TUI Travel ahead of its first-quarter results next week on concerns over current trading."We believe current trading is strong reflecting the tailwind of 2012 being the wettest year on record in England, but still see headwinds in continental Europe," the broker said.BC