By Peter Schroeder - 09/20/11 01:26 PM EDT
Regulators are looking at potential insider trading done right before Standard & Poor's downgraded the United States.
Meanwhile, confidence remains hard to come by in Europe - the credit rater has downgraded Italy.
What exactly would happen if Greece defaulted?
And in the midst of all this turmoil, the Federal Reserve meets to figure out its next move.