S&P Global Ratings assigned its 'AAA (sf)' rating to Citibank Credit Card Issuance Trust's (CCCIT's) $775 million floating-rate Citiseries class 2017-A6 notes. The rating reflects: Our view that the 18.50% credit support provided by the class B and C notes and the series 2009 credit card participation certificate are sufficient to withstand the simultaneous stresses we apply to our 6.25% base-case loss rate, 16.50% base-case payment rate, 15.00% base-case yield, and 3.00%-to-flat purchase rate assumptions. In addition, we used stressed excess spread to assess whether, in our opinion, the available credit support is commensurate with the assigned 'AAA (sf)' rating on the class 2017-A6 notes. We based all of the stress assumptions outlined above on our current criteria and assumptions
