Greek concerns sink stocks

Concerns over Greece's ability to renegotiate the terms of its bailout sent the markets tumbling to a sharply lower close with Dow plummeting 142 points to 17,928. Nasdaq sank 77 points to 4,939.

On the upside

Abiomed (Nasdaq: ABMD) impressed with sharply higher fourth quarter earnings and revenue that beat analyst expectations and lifted its 2016 revenue guidance.

Bloomberg reported that Quebec may purchase a rail line and port facilities that support the Bloomfield Lake mining site owned by Cliffs Natural Resources (NYSE: CLF) .

EarthLink (Nasdaq: ELNK) narrowed first quarter losses more than expected.

On the downside

Second quarter earning slipped for Kulicke & Soffa (Nasdaq: KLIC) to fall short of expectations and the company forecast current quarter revenue below estimates.

PTC Therapeutics (Nasdaq: PTCT) widened first quarter losses as revenue fell prompting a downgrade.

NeoStem (Nasdaq: NBS) widened losses for the first quarter on lower revenue.

In the broad market, declining issues outpaced advancers by a margin of more than 7 to 2 on the NYSE and by nearly 7 to 2 on Nasdaq. The broader S&P 500 plunged 25 points to 2089. Bitcoin slipped $2 to $235.