U.S. stocks also crawled back into positive territory during the afternoon as investors continued to watch the Greece debt negotiations ahead of a scheduled Wednesday meeting of Eurozone finance leaders, according to CNBC.
Investors also have their eye on the nonfarm payrolls report, which will come out Thursday.
The Dow Jones Industrial Average gained 23.03 points to 17, 619.38, the S&P 500 composite index closed up 5.46 points to end at 2, 063.10 and the NASDAQ composite index rose 28.40 points to 4, 986.87.
Top Percentage Gainers
 Company |  $ Stock Price |  $ Change |  % Change |
  Navistar International |   22.63 |   0.48 |   2.17% |
  Health Net |   64.12 |   0.32 |   0.50% |
  General Dynamics |   141.69 |   0.54 |   0.38% |
  AECOM |   33.08 |   0.11 |   0.33% |
  ICF International |   34.86 |   0.09 |   0.26% |
Market Summary
 Advancing Issues |   12 (40.00%) |
 Declining Issues |   18 (60.00%) |
 Unchanged Issues |    0 |
Executive Mosaic‘s GovCon Index is a composite index that tracks 30 of the largest publicly-traded Government Contracting (GovCon) firms.