Losses in the transportation and biotechnology sector sent U.S. stocks slightly down Thursday and many investors attributed the trading activity and volume to uncertainty over negotiations between Greece and its creditors, according to CNBC.
The Dow Jones Industrial Average fell 75.71 points to 17, 890.36, the S&P 500 composite index declined 6.27 points to 2, 102.31 and the NASDAQ composite index lost 10.22 points to 5, 112.19.
Top Percentage Gainers
 Company |  $ Stock Price |  $ Change |  % Change |
 Maximus |  67.01 |   1.88 |   2.89% |
 Health Net |   65.04 |   1.33 |   2.09% |
 CGI Group |   41.41 |   0.68 |   1.67% |
 ICF International |   35.49 |   0.43 |   1.23% |
 Booz Allen Hamilton |   26.54 |   0.27 |   1.03% |
Market Summary
 Advancing Issues |   8 (26.66%) |
 Declining Issues |  22 (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.