Calamos Investments Statement on ARPS Lawsuit (CLMS)

Calamos Investments CLMS announced that a law firm has re-filed a putative class action lawsuit, previously announced on August 16, 2010 and later voluntarily dismissed, on behalf of an asserted class of common shareholders of Calamos Convertible and High Income Fund CHY, alleging breach of fiduciary duty, aiding and abetting breach of fiduciary duty and unjust enrichment in connection with the redemption of auction rate preferred securities by CHY following the collapse of auction markets in February 2008. The named defendants include CHY itself, the current and former trustees of CHY, Calamos Advisors LLC and Calamos Asset Management, Inc. Calamos Advisors and Calamos Asset Management believe that the lawsuit is without merit and intend to defend themselves vigorously against these charges.