GOING DOWN _lowres

Associated Press file photo -- Low oil prices helped cost Exxon its pristine AAA credit rating from Standard & Poor's, a label it held for over six decades, S&P announced Tuesday.

Low oil prices helped cost Exxon its pristine AAA credit rating from Standard & Poor’s, a label it held for more than six decades.

The top AAA credit rating from S&P means a company’s debt is the safest possible investment. Now, only two other U.S. corporations are rated triple-A by S&P: consumer and medical products company Johnson & Johnson and technology company Microsoft Corp.

S&P said Tuesday that it lowered Exxon’s rating one notch to AA+ because of slumping oil prices and the “large dividend payments” the oil giant makes to shareholders. The credit-rating agency said Exxon is more likely to pay dividends than save money or reduce its debt. Exxon had held the AAA rating since at least 1949, S&P said.

The one-notch downgrade, while symbolic, is more likely to bruise Exxon’s corporate pride than significantly raise its borrowing costs. The company has used the sterling rating almost as a marketing tool, particularly when talking to foreign governments.

“I don’t see it having any financial impact,” said Brian Youngberg, an analyst at Edward Jones. “Even at AA+ it has the highest credit rating of any energy company, and it is higher than pretty much all of corporate America.”

Another major ratings agency, Moody’s Investors Service, said in February that it was keeping its top Aaa rating on Exxon. But it sounded a cautionary note by lowering its outlook on the rating to “negative” from “stable.”

ExxonMobil Corp., which is based in Irving, Texas, said in a statement that nothing has changed about its “financial philosophy” and that it places a “high value on its strong credit position.”

Like other energy companies, Exxon has been hurt by the slump in oil prices. In the previous quarter, the company reported a 58 percent drop in profit to $2.78 billion. It was Exxon’s smallest quarterly profit in about 14 years.

Exxon’s long-term debt soared to $19.9 billion at the beginning of 2016 from $6.9 billion at the start of 2014, as the company spent money on big projects while oil prices were falling.

Last year, the company raised its quarterly dividend 6 percent to 73 cents per share. It returned $15.1 billion to shareholders in dividends and share buybacks, down from $23.6 billion in 2014.

In February, Exxon announced that it would stop buying back its own shares.

Wall Street appeared to shrug off the ratings downgrade news. Exxon’s stock rose 30 cents to $87.63 Tuesday.