...Standard & Poor's Ratings Services affirmed its '##+/A-1+' ratings on Wyoming Community Development Authority's (WCDA) series 2007-4, 2007-6, 2007-8, and 2007-11 housing revenue bonds. The outlook is stable. This rating action reflects new standby bond purchase agreements (SBPAs), effective Sept. 24, 2015, provided by the Federal Home Loan Bank of Des Moines, substituting prior SBPAs provided by The Bank of New York Mellon. The long-term component of the ratings reflects our view of WCDA's credit characteristics. The short-term component of the ratings reflects the new SBPAs provided by Federal Home Loan Bank of Des Moines ('A-1+'). Each new SBPA covers principal and 187 days' interest at a maximum 12% annual rate for the purchase price of bonds that are not successfully remarketed. The SBPA covers bonds in the weekly and term interest-rate mode. The SBPAs are scheduled to expire on Sept. 24, 2017, at which time we will remove the short-term component of the ratings unless the SBPAs are...