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Since 1950, September is the worst performing month for the S&P 500 index.
Here's how to tell if excessive shorting will result in a reversal known as a short squeeze.
While U.S. indexes suffer from the dog days of summer, emerging markets look to be on a tear.
The Dow shattered through the 17,000-mark Thursday for the first time ever. So far this year, however, the index has been left behind.