Standard & Poor's might decide to leave South Carolina's rating at AA-plus, the rating it gave the federal government Friday. Or it could decide to downgrade all states, Loftis said.
South Carolina has been rated at the top by the nation's other two main credit-rating agencies, Moody's and Fitch, since at least the 1970s. But it's been a notch lower with S&P since July 2005, according to his office.
South Carolina's blended rate, among the top 15 of states nationwide, still allows it to enjoy the best rates when it borrows money for everything from road projects to school buildings, Loftis said.
"We're in that top tier. We're proud of our rate," he said. It's "an excellent position for a small Southern state to be in. Our balanced budget provision means a great deal to us, and it keeps us on the straight and narrow."
As of Nov. 1, just eight states had AAA scores across the big three rating agencies, according to a report prepared by the treasurer's office.
Even if S&P downgraded South Carolina by another notch, while Moody's and Fitch kept it at AAA, the impact could be negligible, Loftis said.
"But to be frank, you hear a lot of opinions about this, but nobody really knows," he said. "I think you're going to have evolving versions about what's going to happen for some time."
S&P officials say they will indicate shortly how local and state governments will be affected by their decision to lower the long-term U.S. debt. On Friday, the agency said it downgraded U.S. debt for the first time in history because the credit rating agency lacks confidence that political leaders will make the choices needed to avert a long-term fiscal crisis.
In a July report on outcomes to the debt ceiling crisis, S&P suggested the best of three possible scenarios for state governments and other public finance entities would be for Congress to raise the ceiling without making drastic cuts.
"While this outcome would raise borrowing costs for the federal government, it could be a mostly benign outcome for the public finance sector and likely the least disruptive scenario," it read.
Last month, in the midst of political gridlock on raising the federal debt ceiling, Moody's threatened to downgrade the AAA rankings of South Carolina and four other states, saying they're most vulnerable for their reliance on federal money. Moody's reaffirmed the gold-plated rating for all of them last week, though with a negative outlook, saying the federal pact dealt with the immediate threat of a default.