Facts about state bond ratings include that North Dakota and Texas have AAA ratings with Standard and Poor's due to oil booms, and S&P downgraded New Jersey's rating to AA- due to overly optimistic forecasts in 2014, according to the Pew Charitable Trusts. California earned a "positive" rating in 2014.
Missouri, North Carolina and Virginia have had AAA ratings with S&P for 50 years or more, notes the Pew Charitable Trusts. Massachusetts diversified its economy to increase its rating from AA- to AA+ between 2001 and 2014. Alaska increased its rating from AA to AAA between 2003 and 2014 by conservatively managing its oil money.