News that Saudi Arabia and its Middle East allies started a military operation in Yemen helped drive crude oil futures up 4 percent to $51.43 per barrel, CNBC reported.
Investors also considered the Labor Department‘s latest jobless claims support that said claims for state unemployment benefits fell 9, 000 for the week ended March 21, according to CNBC.
The Dow Jones Industrial Average dipped 40.31 points to 17, 678.23, the S&P 500 composite index lost 4.90 points to 2, 056.15 and the NASDAQ composite index fell 13.16 points to 4, 863.36.
Top Percentage Gainers
 Company |  Stock Price |  $ Change |  % Change |
 Harris Corp. |  73.28 |  2.64 |  3.74% |
 Cubic Corp. |  53.33 |  1.26 |  2.42% |
 Booz Allen Hamilton |  28.62 |  0.48 |  1.71% |
 Computer Sciences Corp. |  65.17 |  1.04 |  1.62% |
  CGI Group |  43.35 |  0.68 |  1.59% |
Market Summary
 Advancing Issues |   20 (66.66%) |
 Declining Issues |   10 (33.33%) |
 Unchanged Issues |    0 |
Executive Mosaic‘s GovCon Index is a composite index that tracks 30 of the largest publicly-traded Government Contracting (GovCon) firms.