U.S. markets are down in spite of the Giants' Super Bowl win as worries about Europe continue to drag. Micron Technology shares lower following CEO's death Friday. Netflix is down as Verizon teams up with Coinstar (parent of Redbox) to launch video streaming service. Of the 290 S&P companies that have reported so far, 60 percent have beaten earnings estimates.

Stock index futures pointed to a lower open for Wall Street today, tracking losses in Europe on concerns over whether Greece can avoid a messy default. Greece's coalition parties must tell the European Union on Monday whether they accept the painful terms of a new bailout deal as EU patience wears thin with political dithering in Athens over implementing reforms.

Michael Gurka, managing director of Spectrum Asset Management, told CNBC, "I think the common base here is that you are going to continue to see low volume not just because of people on the sidelines but just scepticism over whether this rally can continue."

Peter Morici, economics professor at the University of Maryland, told CNBC, "certainly no one wants chaos and an uncontrolled default but there are alternatives to what is being worked out here, my feeling is that the ultimate package we get will not be a solution to Greece's problems."

US futures point to Wall Street opening down today as European shares fell back from a six-month high early today, with investors worried about whether Greece can avoid a messy default as its politicians struggled to agree austerity measures needed to secure a bailout package. Asian shares ended mostly higher as surprisingly robust U.S. jobs data bolstered investors' risk appetite.