"Greece fatigue" had already set in on Wall Street this week even before the latest fumbling between Greece, the EU and IMF on a debt deal that would keep Greece in the euro zone.
On Thursday, Greece could once more dominate markets, as traders watch for the 8:30 a.m. ET release of key personal income and spending data, and the PCE deflator, an inflation measure watched by the Fed. There are also weekly jobless claims at 8:30 a.m., and a 7-year note auction at 1 p.m. ET.
Stocks headed south Wednesday as negotiations between Greece and EU finance ministers hit a wall. European leaders were set to meet Thursday with Greek Prime Minister Alexis Tsipras. The Eurogroup said it would continue to meet Thursday, ahead of the leaders meeting.