DETROIT, Nov. 14 /PRNewswire-FirstCall/ -- The Comerica Incorporated Board of Directors has authorized the Corporation to purchase up to 10 million shares, or 6.3 percent, of its outstanding common stock at September 30, 2006.

(Logo: http://www.newscom.com/cgi-bin/prnh/20010807/CMALOGO )

The shares will be purchased from time to time in the open market or through negotiated transactions and used for general corporate purposes. This action is in addition to an existing program with a remaining authorization at September 30, 2006, to purchase up to approximately 4.0 million shares.

Comerica Incorporated (NYSE: CMA) is a financial services company headquartered in Detroit, strategically aligned into three major business segments: the Business Bank, the Retail Bank, and Wealth & Institutional Management. Comerica focuses on relationships and helping businesses and people to be successful. Comerica Bank locations can be found in Michigan, California, Texas, Florida and Arizona, with select businesses operating in several other states, and Canada and Mexico. Comerica reported total assets of $58.5 billion at September 30, 2006. To receive e-mail alerts of breaking Comerica news, go to http://www.comerica.com/newsalerts .

SOURCE: Comerica Incorporated

CONTACT: Media Contacts: Wayne J. Mielke, +1-313-222-4732, or Kathleen
A. Pitton, +1-313-222-4916, or Investor Contacts: Darlene P. Persons,
+1-313-222-2840, or Paul Jaremski, +1-313-222-6317, all of Comerica
Incorporated

Web site: http://www.comerica.com/