This story is developing. Please check back for further updates. Greece has reached an agreement, in principle, with the European Union to stay in an EU bailout program, a source familiar with the matter told CNBC Wednesday. The discussions will continue through Monday, according to the source. Futures added to gains, while Treasury bond yields climbed following the report. The euro rose against the dollar. Meanwhile, a Eurogroup source told Reuters that there is no "deal" yet with Greece, but there may be an agreement to explore the possibility of extending the bailout program. (full story)