Lambert Airport is being rewarded for what analysts are calling "prudent fiscal management".
The Fitch Ratings Agency upgraded the facilities credit rating to BBB+. The rating cited stability in air traffic and an adequate ability to meet financial commitments.
Fitch assigns ratings that range from D at the low end up to AAA. BBB+ is considered in to be at the high end of mid-grade investments.
Missouri currently enjoys a triple-A rating.
But Moody's Investors Service last week assigned a negative outlook to Missouri because of the proportion of the state budget that already comes from the federally and state-funded Medicaid program.
If Missouri expands Medicaid eligibility as called for in the federal Healthcare Reform Act, it would get billions of dollars more from the federal government in coming years.