U.S. railroad CSX Corp. has set up a $1 billion commercial paper (CP) program. We are assigning our 'A-2' short-term issuer credit rating to CSX and our 'A-2' issue-level rating to the new CP program. Our 'BBB+' issuer credit rating and stable outlook on CSX remain unchanged. On Sept. 18, 2018, S&P Global Ratings assigned its 'A-2' short-term issuer credit rating to Jacksonville, Fla.-based CSX Corp. We also assigned our 'A-2' issue rating to the company's $1 billion 4(a)(2) CP program. The CP program will be backed by the company's $1 billion revolving credit facility that matures in 2020 (unrated). We base our 'A-2' short-term issuer credit rating on the 'BBB+' long-term issuer credit rating. The long-term issuer credit rating,