Stock Market Today: S&P Eyes Monthly Decline as QE Jitters Set In

NEW YORK (TheStreet) -- After moving off session lows, U.S. stock markets continued trading in the red late Monday afternoon.

Investors were struggling for direction as the quarter closes out, heading into October with its numerous uncertainties. The third-quarter earnings season ramps up in mid-October and the Federal Reserve's monthly asset buying program is expected to end officially next month. 

The divergence between the Russell 2000  index of smaller companies and S&P 500  was also fueling worries of a broader market top. 

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The Dow Jones Industrial Average fell 0.5%. The S&P 500 dipped 0.5%, on track for a monthly decline. The Nasdaq   was off 0.43%. 

Watch the video below for a closer look at how U.S. markets are doing in midday trading Monday:

"The bigger concern from where we sit is ... what will happen when QE3 ends," said Adam Sarhan, CEO of Sarhan Capital. The S&P 500 has soared when QE has been in effect and fell 17% when QE1 ended and dropped 22% when QE2 ended. "It will be very interesting to see how the market reacts when QE3 officially ends next month," said Sarhan.

The strengthening dollar, meanwhile, continues to fuel concerns about the performance of multinational corporations during the third quarter.

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