Michigan Economy Ticks Up in September, Reports Comerica Bank's Michigan Economic Activity Index

DALLAS, Dec. 5, 2011 /PRNewswire/ -- Comerica Bank's Michigan Economic Activity Index rose one point in September, to a level of 88.  The September index level is 17 points, or 24 percent, above the index cyclical low of 71.  Year-to-date the index has averaged 87...