U.S. investors are watching for many economic reports this week such as the jobs report, data on construction and manufacturing and factory orders, CNBC reported.
Many corporate earnings reports for their first fiscal quarters will start to become public in April and a strong U.S. dollar will likely be a factor, according to CNBC.
The Dow Jones Industrial Average sank 1.11 percent to 17, 776.12, the S&P 500 composite index fell 13.35 points to 2, 067.89 and the NASDAQ composite index lost 46.56 points to 4, 900.88.
Top Percentage Gainers
 Company |  Stock Price |  $ Change |  % Change |
 Intelsat |  12.00 |  0.20 |  1.69% |
  Harris Corp. |  78.76 |  1.13 |  1.46% |
 Navistar |  29.50 |  0.33 |  1.13% |
 Maximus |  66.76 |  0.36 |  0.54% |
 Exelis |  24.37 |  0.10 |  0.41% |
Market Summary
 Advancing Issues |   5 (16.66%) |
 Declining Issues |   25 (83.33%) |
 Unchanged Issues |   0 |
Executive Mosaic‘s GovCon Index is a composite index that tracks 30 of the largest publicly-traded Government Contracting (GovCon) firms.