Lower open over deadlocked Greek negotiations

The markets opened lower with the Dow losing 28 points to 17,821 as negotiations between Greece and its creditors remain deadlocked. Nasdaq fell 15 points to 5,053.

On the upside

Shares of MannKind (Nasdaq: MNKD) continued rising.

Synthesis Energy (Nasdaq: SYMX) announced the commissioning phase of an industrial syngas gasification plant in China.

PlasmaTech Biopharmaceuticals (Nasdaq: PTBI) has licensed an AAV gene therapy to treat juvenile Batten disease from UNeMed.

On the downside

Investors locked in profits on Wynn Resorts (Nasdaq: WYNN).

Profit taking weighed down shares of Yingli Green Energy (NYSE: YGE).

Raymond James downgraded American Airlines (NYSE: AAL) from an Outperform rating to a Market Perform rating.

In the broad market, declining issues outpaced advancers by a margin of more than 7 to 5 on both the NYSE and on Nasdaq. The broader S&P 500 slipped 3 points to 2089. Bitcoin added $3 to $227.