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In the S&P 500, six of the 10 main industry groups fell, led by a 0.8 percent drop in telecommunications stocks.

In Europe, stocks fell. Greek stocks fell 2 percent. Spain’s main index was off 1 percent.

Investors are on edge this week because of a series of meetings among European leaders to discuss the debt crisis. The first came Monday when the Greek foreign minister met with his German counterpart in Berlin to discuss Greek spending cuts necessary for the country to continue receiving bailout money.