US stocks opened lower on Monday after a five-week rally on concerns Greece will be unable to avoid a chaotic default as it tries to reach terms on a new bailout package.
The Dow Jones Industrial Average dropped 53.20 points, or 0.41%, to 12,809.03. The Standard & Poor's 500 Index dropped 5.81 points, or 0.43%, to 1,339.09. The Nasdaq Composite Index dropped 15.26 points, or 0.53%, to 2,890.40.