The stock market sees a big recovery rally on Tuesday, with the major indexes recouping some losses after three consecutive sessions of declines. 
$Nasdaq Composite Index (.IXIC.US)$ fared best out of the major indexes, closing up 2.4%. 
$S&P 500 Index (.SPX.US)$ also fared well, notching a gain of 1.8%. It managed to close above the key 50-day moving average. 
$Dow Jones Industrial Average (.DJI.US)$ lagged the other major indexes, but still managed to close up more than 550 points as it rose 1.6%.
Indeed it's good news for most of the investors. But why was the market keep running up and down in recent days? 
Is there any important news that is responsible for the upward trend?
Or the most significant threat has been eliminated?
Would you comment and tell mooers about your thoughts？
Source:
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