Higher open on Greek bank news

A possible infusion of cash into Greek banks sent the markets soaring with the Dow leaping 179 points to 17,552. Nasdaq jumped 53 points to 5,096.

On the upside

Shares of Aquinox Pharmaceuticals (Nasdaq: AQXP) continued soaring.

Warren Buffett's Berkshire Hathaway will pay a premium of approximately $37.2 billion to acquire Precision Castparts (NYSE: PCP).

AstraZeneca (NYSE: AZN) entered an agreement to develop Inovio Pharmaceuticals' (Nasdaq: INO) experimental cancer vaccine INO-3112.

On the downside

Dean Foods (NYSE: DF) swung to a profit for the second quarter but revenue fell to miss expectations and the company announced the resignation of chairman Tom C. Davis.

Morgan Stanley downgraded JD.com (Nasdaq: JD) from an Overweight rating to an Equalweight rating and cut its price target from $41 to $35.

Groupon (Nasdaq: GRPN) swung to a profit for the second quarter but the company cut its current quarter revenue guidance.

In the broad market, advancing issues outpaced decliners 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 soared 20 points to 2097. Bitcoin eased $1 to $260.