The GovCon Index gained 0.407 points to 68.524 Tuesday, a day that saw the close adjusted with the addition of two new government contracting firms to the Index.
Tuesday marked the Index’s first day of tracking new members Orbital ATK (NYSE: OA), the company formed out of the merger of ATKâs aerospace and defense groups with Orbital Sciences, and shipbuilder Huntington Ingalls (NYSE: HII).
The Dow Jones Industrial Average rose 139.55 points to 17, 868.76, the S&P 500 composite index gained 21.85 points to 2, 068.59 and the NASDAQ composite index climbed 61.63 points to 2, 787.65.
Top Percentage Gainers
 Company |  Stock Price |  $ Change |  % Change |
  Healthnet |   56.01 |   1.21 |   2.21% |
  BAE Systems Inc. |   31.89 |   0.68 |   2.18% |
  CGI Group |   42.24 |   0.86 |   2.08% |
  McKesson |   222.45 |   4.19 |   1.92% |
 SAIC |   51.38 |   0.74 |   1.46% |
Market Summary
 Advancing Issues |  23 (76.66%) |
 Declining Issues |   7 (24.33%) |
 Unchanged Issues |   0 |
Executive Mosaic‘s GovCon Index is a composite index that tracks 30 of the largest publicly-traded Government Contracting (GovCon) firms.