BUZZ-Top of the Street: round-up of highly rated analyst action in Europe

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 (Other OTC: AMSYF - news) : Credit Suisse (NYSE: CS - news) downgrades to neutral, lack of earnings momentum & rich valuation.

** Airbus : Kepler Cheuvreux, 5-star analyst, cuts 2014 EBIT estimates by 7% on lower deliveries, costs but maintains buy, 2015 estimates & target price.

** Saint Gobain (Berlin: GOB.BE - news) : Natixis (Paris: FR0000120685 - news) , top-ranked analyst, ups target price to 50, top pick in sector.

** Centrica (Frankfurt: CENB.F - news) : CS, 5-star analyst, cuts EPS estimates by 9% for 2015, price rise for next year at British Gas no longer likely, keeps neutral.

** WPP (Frankfurt: 0WP.F - news) : Macquarie, 5-star analyst, keeps outperform, Q1 results later this month could provide catalyst for stock to cut YTD underperformance vs FTSE.

** BHP : UBS (Xetra: UB0BL6 - news) , top-ranked analyst, keeps buy on demerger news.

** Gas Natural Fenosa : UBS, 5-star analyst on earnings accuracy, cuts EPS to 15% below mean on regulatory risk.

* Analyst rankings from Thomson Reuters StarMine. Scale is from 1-star to 5-star with 5 being best. Analysts ranked on earnings accuracy as well as relative performance of recommendations over trailing 12-month & 24-month periods.

(Stocks Buzz is a pilot project. Please send any feedback or suggestions to vikram.subhedar@thomsonreuters.com) (RM (LSE: RM.L - news) : vikram.subhedar.thomsonreuters.com@reuters.net)