Update, 10:27am- The DOW is down 341, the S&P is down 43, the NASDAQ is down 96.
The United States' credit rating was lowered Friday night. Monday morning, the first day of trading since the downgrade, stocks have instantly tumbled. At 9:32am, the DOW is down 225 (approximately 2%), the S&P is down 24 (approximately 2%), and the NASDAQ is down 84 (approximately 3.5%).
Update: Gold and Silver are way up.