Last checked at 
Ratings & estimate changes by Europe's top-ranked* analysts:
** Go-ahead : Goldman adds to conviction buy list,key short-term catalyst is co winning Thameslink franchise.
** ArcelorMittal : Credit Suisse downgrades toneutral, lack of earnings momentum & rich valuation.
** Airbus : Kepler Cheuvreux, 5-star analyst, cuts2014 EBIT estimates by 7% on lower deliveries, costs butmaintains buy, 2015 estimates & target price.
** Saint Gobain : Natixis, top-ranked analyst, upstarget price to 50, top pick in sector.
** Centrica : CS, 5-star analyst, cuts EPS estimatesby 9% for 2015, price rise for next year at British Gas nolonger likely, keeps neutral.
** WPP : Macquarie, 5-star analyst, keeps outperform,Q1 results later this month could provide catalyst for stock tocut YTD underperformance vs FTSE.
** BHP : UBS, top-ranked analyst, keeps buyon demerger news.
** Gas Natural Fenosa : UBS, 5-star analyst onearnings accuracy, cuts EPS to 15% below mean on regulatoryrisk.
* Analyst rankings from Thomson Reuters StarMine. Scale isfrom 1-star to 5-star with 5 being best. Analysts ranked onearnings accuracy as well as relative performance ofrecommendations over trailing 12-month & 24-month periods.
(Stocks Buzz is a pilot project. Please send any feedback orsuggestions to vikram.subhedar@thomsonreuters.com) (RM: vikram.subhedar.thomsonreuters.com@reuters.net)
