-- Argo Group US Inc. is a national provider of specialty property/casualty insurance. Its Bermuda-based parent acquired a U.K. insurer in 2008, potentially exposing it to greater earnings volatility. -- We are revising our outlook on Argo Group US Inc. and its insurance subsidiaries to stable from negative because we believe the company has adequately addressed our concerns regarding the acquisition. -- We are affirming our ratings on Argo Group US and its subsidiaries. NEW YORK (Standard&Poor's) May 13, 2009--Standard&Poor's Ratings Services today said it revised its outlook on Argo Group US Inc. (AGUS), a wholly owned subsidiary of Bermuda-based Argo Group International Holdings Ltd. (NASDAQ:AGII), and AGUS's insurance company affiliates (collectively referred to as Argo)