Stock Market goes up, stock market goes down.
That is why your quote says it has not been that low since July 2006, because it went below 11,000 then and then bounced back up never to go that low for another 2 years.
So you can be negative and say the sky is falling or you can be positive and say hey it was this low once in 2006 and it went up and it will do it again. If the market never goes down and every body buys high or at flat prices the market just does not work properly.
You doom and gloom people are what causes part of these swings, if people did not start hording because some liberal economist predicts gloom the markets would continue to grow.
Fear drives the market a lot more than reality. That is why Liberals operate so much on gloom and fear, the sheep follow better when they are scared!