Even if Greece and the Institute of International Finance reach a deal this weekend over their government-issued debt, they aren't out of the woods yet. Ben May, a European economist at Capital Economics in London, says, "The real issue will be how many of Greece's creditors will participate in that deal." It could be a long weekend in Athens. And the Daily Pulse is up a beat or two on news that more home buyers are signing on the dotted line than were a year ago. The National Association of Realtors reported today that existing home sales in December increased 5 percent over November’s total.