TORONTO (S&P Global Ratings) May 22, 2023--S&P Global Ratings today said that it assigned its 'AA+' issue-level rating to National Securities Clearing Corp.'s (NSCC; AA+/Stable/A-1+) $1 billion senior notes maturing in 2025 and 2028. The rating is in line with our 'AA+' long-term issuer credit rating on NSCC. The proceeds from these notes will be used to refinance the $1 billion senior notes maturing in December 2023. These notes constitute liquid resources that will be held in bank deposits, predominantly at the Federal Reserve Bank of New York, to facilitate settlement in the event a member defaults. Given that the company cannot use these debt proceeds for general corporate purposes, we view the transaction as leverage neutral. In addition, we