Atlantic City’s upgraded investment rating helped give a boost to the city’s Municipal Utilities Authority. According to BreakingAC.com, Moody’s has increased the authority’s rating from Baa2 to Baa1, the highest of the medium-grade investments and just a step before heading into A. The new grade means ACMUA demonstrates solid financial fundamentals, strong operating performance and a stable capacity to meet its financial obligations, the authority said in a news release.