Standard&Poor's Ratings Services affirmed its 'AA/A-1+' rating on Michigan State Housing Development Authority's offered variable-rate rental housing revenue bonds series 2008A (AMT), and series 2000A (MBIA), due to the bank facility being extended to Sept. 28, 2012. The long-term component of the rating is based on Michigan State Housing Development Authority. The short-term component of the rating is based on JPMorgan Chase Bank N.A. At the same time, Standard&Poor's affirmed its 'AA/A-1' rating on the authority's rental housing variable-rate demand bonds series 2002B due to the bank facility being extended to Sept. 1, 2011. The long-term component of the rating is based on Michigan State Housing Development Authority. The short-term component of the rating is based