Heading for a double-dip?

Four features stand out from fragile week in the markets but no global financial crisis 2

There is a problem with chart and technical analysis. Often you see the effect before you know the cause. The head-and-shoulders chart pattern in the Dow made it a high probability the market would collapse - the effect. Analysts will debate the cause of the collapse for many months. The important feature is that traders who used chart analysis were able to take action to reduce the effect of the market fall because they were forewarned as the Dow hit the targets we suggested last week.

But what a fall. What a rebound. What to make of it all? There are four important features that stand out from this fragile week in the markets.