S&P Global Ratings assigned its 'AAA' long-term rating to the Colorado Housing&Finance Authority's (CHFA) series 2017C and 2017D single-family mortgage class I bonds. Additionally, S&P Global Ratings affirmed all ratings on outstanding class I and class II bonds within the indenture. The outlook on the ratings, where applicable, is stable. Along with the issuance of series 2017C and 2017D, the authority is issuing series 2017E floating rate notes that will be directly purchased by Wells Fargo Bank N.A. We will not rate this series. The ratings reflect our opinion of the indenture's following strengths: Substantial over-collateralization at nearly 120% on the class I bonds, and 110% on the class II bonds; A loan portfolio of very strong credit