...NEW YORK (S&P Global Ratings) May 5, 2017--S&P Global Ratings assigned its '##+' rating to Pennsylvania Housing Finance Agency's (PHFA) series 2017-123A and 2017-123B, and its 'A-1+' rating to the series 2017-123C single-family mortgage revenue bonds, issued under the agency's single-family parity indenture. At the same time, S&P Global Ratings affirmed its '##+', '##+/A-1+', and '##+/A-1' ratings on all other outstanding issues under the parity resolution. The outlook on all long-term ratings is stable. "The stable outlook reflects our expectation that PHFA will continue to provide a high degree of security to bondholders by maintaining federal insurance or guarantees for most of its single-family loans," said S&P Global Ratings credit analyst David Greenblatt. The '##+' rating reflects our view of the following strengths: + The credit quality of the loan insurance, which we consider very strong, since 67% of the loans carry federal insurance or guarantees (which benefit from the full...