Mixed close over Greek debt concerns

It was a mixed close for the markets with the Dow falling 44 points to 17,985 over concerns about Greece's ability to repay its debt. Nasdaq gained 18 points to 4,924.

On the upside

ExamWorks Group (NYSE: EXAM) swung to a better than expected profit for the fourth quarter as revenue rose.

Fourth quarter earnings and revenue rose for Trinity Industries (NYSE: TRN) to beat analyst expectations.

Cowen analysts expect Facebook's (Nasdaq: FB) Instagram photo sharing application to double its number of users in five year and valued the app at $33 billion.

On the downside

Shares of Intelsat (NYSE: I) extended its losses.

Key Energy Services (NYSE: KEG) widened fourth quarter losses more than expected.

Goldcorp (NYSE: GG) widened losses more than expected for the fourth quarter as revenue fell.

In the broad market, declining issues outpaced advancers by a margin of 10 to 9 on the NYSE while advancers edged out decliners by more than 10 to 9 on Nasdaq. The broader S&P 500 slipped 2 points to 2097. Bitcoin rose $5 to $238.