UNDATED - It's another nervous day for investors on Wall Street.  Standard and Poors downgraded the U.S. credit rating from AAA to AA+, which has investors selling off stocks.  However, St. Cloud State Economics Professor King Banaian says the bigger picture is the overall global economy, which is also struggling.

Banaian says it's too soon to tell, but he says it's possible the U.S. could slip into another recession.

Meanwhile, oil prices have dropped below $84 a barrel because of today's news.

Check out the latest status of The Dow Jones Industrial Averages.