Optimism that Greece will present a reform plan to European officials lifted the markets during the midday with the Dow soaring 114 points to 17,630. Nasdaq climbed 42 points to 4,951.

On the upside

Noah Holdings (NYSE: NOAH) announced yesterday that it would repurchase up to $50 million worth of American Depositary Shares.

Alcoa (NYSE: AA) reported higher second quarter earnings and revenue.
 
Clean Energy Fuels (Nasdaq: CLNE) completed 14 station construction projects in the first half of 2015 and expects to complete another 22 by the end of the year.
 
On the downside

Aquinox Pharmaceuticals (Nasdaq: AQXP) reported disappointing results from a Phase 2 FLAGSHIP clinical trial with AQX-1125 in patients with chronic obstructive pulmonary disease.

QLogic’s (Nasdaq: QLGC) earnings warning weighed down shares of Brocade Communications Systems (Nasdaq: BRCD).

Shares of Marketo (Nasdaq: MKTO) extended its losses.

In the broad market, advancing issues outpaced decliners by a margin of more than 5 to 2 on the NYSE and by nearly 3 to 1 on Nasdaq. The broader S&P 500 gained 13 points to 2059. Bitcoin added $3 to $268.