Still Blowing Bubbles
by Paul Krugman

The big rise in the stock market is definitely telling us something. Bulls think it says the economy is about to take off. But I think it's a sign that America is still blowing bubbles — that a three-year bear market and the biggest corporate scandals in history haven't cured investors of irrational exuberance yet.

Or, to put it another way: it's hard to find any real news to justify the market's leap. Instead, investors seem to be buying stocks because they are rising — which is pretty much the definition of a bubble.
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