S&P Global Ratings on Monday affirmed the United States’ long-term sovereign credit rating at AA+ and its short-term rating at A-1+, keeping the outlook at “stable.” The agency said the U.S. continues to benefit from a diversified and resilient economy and the dollar’s role as the world’s principal reserve currency, but warned that large fiscal deficits and a rising interest burden remain constraining factors. The confirmation follows Moody’s one-notch downgrade of the U.S. to Aa1 in May and Fitch’s cut to AA+ last year, leaving all three major rating firms aligned at the same level below the top tier. S&P last downgraded the U.S. in 2011 and has kept the AA+ assessment since. Currency markets showed a modest reaction, with the yen slipping against the dollar after the announcement, as investors welcomed the absence of further erosion in the U.S. sovereign profile.