There has to be concern about sustainability of growth overseas; Japan is central to that issue, ... If people are looking at fundamentals, that's the only news they have to look at this morning.
I think it's just oil and optimism about the New Year. I think oil is the driving factor due to the warmer weather, but people are now looking for better than expected (fourth-quarter) earnings, better than expected retail sales number. There's a host of good numbers out there.
I think futures are up because people are looking ahead to today's numbers and seeing that this economy continues to move ahead very nicely, no matter what problems a specific company may be reporting.