The markets opened mixed with the Dow losing 30 points to 12,847 while Nasdaq rose 10 points to 2942 as Greece struggled to meet demands from lenders.

On the upside

Fourth quarter earnings dropped for Abercrombie & Fitch (NYSE: ANF) but the company forecast 2013 earnings ahead of estimates.

Comcast (Nasdaq: CMCSA) reported higher fourth quarter earnings that beat analyst expectations, increased its dividend and announced a $6.5 billion stock repurchase plan.

Dean Foods (NYSE: DF) narrowed fourth quarter losses more than expected and forecast first quarter results ahead of estimates.

On the downside

Zynga (Nasdaq: ZNGA) widened first quarter losses due to significant stock compensation costs.

Vonage (NYSE: VG) reported higher fourth quarter earnings but warned of lower 2012 results as the company invests in strategic growth initiatives.

Fourth quarter earnings tumbled for Willis Group (NYSE: WSH) to fall short of expectations.

In the broad market, advancing issues outpaced decliners by a margin of more than 10 to 9 on the NYSE while decliners barely edged out advancers by a slim margin on Nasdaq. The Russell 2000 which tracks small cap stocks slipped 2 points to 818.