NEW YORK, Nov 5 (Reuters) - Shares of CVS Caremark Corp plunged in premarket trading on Thursday after comments from CEO Tom Ryan on weakness in the pharmacy benefit management business.
CVS shares were down 19.8 percent at $28.90.
Shares of other pharmacy benefit companies fell also.
Medco Health lost 2.8 percent and Walgreen Co lost 3.2 percent after the comments.
For details, see ID:

(Reporting by Angela Moon; Editing by James Dalgleish) Keywords: MARKETS STOCKS BEFORETHEBELL (angela.moon@thomsonreuters.com; Tel: +1 646 223 5685; Reuters Messaging:angela.moon.reuters.com@reuters.net)

COPYRIGHT

Copyright Thomson Reuters 2009. All rights reserved. The copying, republication or redistribution of Reuters News Content, including by framing or similar means, is expressly prohibited without the prior written consent of Thomson Reuters.