...DALLAS (S&P Global Ratings) Oct. 5, 2018--S&P Global Ratings raised its ratings on Nashville & Davidson County Metropolitan Government (Metro), Tenn.'s non-tax revenue debt to '##' from '##-' on sports authority debt series 2012A and B, series 2013A and B, series 2013A and B ballpark bonds, and series 2014; bonds; and to '##' from 'A' on convention center authority debt series 2010B. The outlook is stable. "We base the upgrade on the application of our Issue Credit Ratings Linked To U.S. Public Finance Obligors' Creditworthiness criteria," said S&P Global Ratings credit analyst Kristin Button. See the article published Jan. 22, 2018, on RatingsDirect. We rate the non-tax revenue bonds at the same level as our view of Nashville's general creditworthiness, because we believe the ability of the city to pay the obligations is closely tied to its operations. Although each series of debt affected is also secured by various special tax revenues, we rate to the non-tax revenue pledge because we...