Greece intends to ask for an extension of its loan agreement with the euro zone on Wednesday, a source in Brussels said, distinguishing this from the country's full bailout program.
Read MoreGreece: The final countdown
Speaking on condition of anonymity, the source said that Athens would request up to a six month extension but the conditions were still under negotiation.
U.S. stocks moved broadly higher on the report, and the S&P 500 hit a new high above 2,100. Yields on U.S. Treasuries hit 7-week highs.