DETROIT, Sept. 21 /PRNewswire-FirstCall/ -- Comerica Bank announced it
will increase its prime rate to 4.75 percent from 4.50 percent effective
today, September 21, 2004.

Comerica Bank is a subsidiary of Comerica Incorporated (NYSE: CMA), a
financial services company headquartered in Detroit, strategically aligned
into three major lines of business: the Business Bank, Small Business &
Personal Financial Services, and Wealth & Institutional Management.
Comerica's more than 11,000 employees focus on relationships, and helping
people and businesses be successful. Comerica Bank locations can be found in
Michigan, California, Texas and Florida, with select businesses operating in
several other states, Canada and Mexico. Comerica reported total assets of
$55 billion at June 30, 2004. To receive e-mail alerts of breaking Comerica
news, go to http://www.comerica.com/newsalerts .

SOURCE Comerica Bank
-0- 09/21/2004
/CONTACT: Media Contact: Wayne J. Mielke, +1-313-222-4732, or Investor
Contact: Judith M. Chavis, +1-313-222-6317, both of Comerica Bank/
/Photo: NewsCom: http://www.newscom.com/cgi-bin/prnh/20010807/CMALOGO
PRN Photo Desk, photodesk@prnewswire.com/
/Web site: http://www.comerica.com /
(CMA)

CO: Comerica Bank
ST: Michigan
IN: FIN
SU:

TM-AM
-- DETU031 --
0421 09/21/2004 16:17 EDT http://www.prnewswire.com