More about market psychology these days everything is driven by macro indicators and fear right now, ignore any good news...
There was a market study just done some months backs. According the stats most investors don't look at the market as a long term investment anymore, more of a quick short term trade. I think this is very evident right now, look at the volatility in the markets... Investors that have been trading for a long time have never seen this before. Add all the high frequency trading and this is what you get...