Bond ratings

The upgrade to "reflects the durability of margins and liquidity, which will be supported by higher property tax receipts under the authorized levy and NBHD's efforts to grow and diversify revenue," Moody's said.

"The limited scope of muni debt affected suggests a marginal impact on the muni market, if any," BofA strategists said.

The second largest Texas city could be headed to a trifecta of triple-A ratings after Fitch revised the outlook on the city's AA-plus rating to positive.

The state, burdened with volatile revenue streams because of its dependence on natural resources, has lower ratings from Fitch, Moody's and S&P .

The one-notch upgrade to AA reflects growth in Kansas Department of Transportation available fund balances and the state's improved credit quality, Fitch said.

Moody's boost to Aa1 to the Desert Community College District affects more than half a billion dollars of general obligation debt.

The airport's bond ratings were raised a notch to A-plus by S&P and to AA by KBRA.

Moody's negative outlook pinned on rough economic seas ahead for the city, possibly through 2025.

The rating agency said the airport has a one-in-three chance of an upgrade over the two-year outlook period.

Moody's boosted CalHFA's rating to Aa2, following a similar move by S&P in December.