What Would a U.S. Debt Downgrade Mean?

Kevin Drum opines that the US government losing its AAA rating wouldn't have much effect:


I can't speak for Obama, but I have a feeling that the significance would be: zero. Granted, there's symbolic importance to something like this, and on a substantive level there are certain funds that are legally prohibited from holding non-AAA debt. So fine: maybe not quite zero.

But U.S. debt is simply too big, too public, and too widely followed for ratings agencies to have much influence over it. Everyone knows what the problems with the American economy are, and no one thinks that the folks at Moody's or S&P know any more about it than anyone else. They just don't have any special expertise to offer here. A downgrade might provide an opportunity for some short-term arbitrage, but beyond that it's not clear if it would have any effect at all. It's the market that determines the price of U.S. debt, not the ratings agencies.

I agree that a US debt downgrade wouldn't be a surprise. But it would certainly have an effect, particularly on the portfolio of institutional investors who have regulatory or contractual mandates to only hold top-rated, ultra safe bonds. And that would certainly be felt in the market for US debt, as all those institutions were forced to unload. How bad the effects would be would depend on how far we were downgraded.

Presented by

Megan McArdle is a columnist at Bloomberg View and a former senior editor at The Atlantic. Her new book is The Up Side of Down.

How to Cook Spaghetti Squash (and Why)

Cooking for yourself is one of the surest ways to eat well. Bestselling author Mark Bittman teaches James Hamblin the recipe that everyone is Googling.

Join the Discussion

After you comment, click Post. If you’re not already logged in you will be asked to log in or register.

blog comments powered by Disqus

Video

How to Cook Spaghetti Squash (and Why)

Cooking for yourself is one of the surest ways to eat well.

Video

Before Tinder, a Tree

Looking for your soulmate? Write a letter to the "Bridegroom's Oak" in Germany.

Video

The Health Benefits of Going Outside

People spend too much time indoors. One solution: ecotherapy.

Video

Where High Tech Meets the 1950s

Why did Green Bank, West Virginia, ban wireless signals? For science.

Video

Yes, Quidditch Is Real

How J.K. Rowling's magical sport spread from Hogwarts to college campuses

Video

Would You Live in a Treehouse?

A treehouse can be an ideal office space, vacation rental, and way of reconnecting with your youth.

More in Business

Just In