FIZZLED OUT: A two-day rally came to an end Monday. Last week, the head of the European Central Bank, Mario Draghi, pledged to protect the euro currency union. Hopes are high that Draghi will back up his words with action this week.
MERGER MONDAY: Chicago Bridge & Iron agreed to buy Shaw Group for roughly $3 billion. Medical equipment maker Roper Industries plans to buy hospital software company Sunquest Information Systems for $1.42 billion.
THE NUMBERS: The Dow Jones industrial average sank 2.65 points to 13,073.01. The Standard & Poor's 500 index fell 0.67 of a point to 1,385.30.