Lower open as Greek debt payment looms

The markets opened lower with the Dow falling 47 points to 17,992 as Greece's first debt payment comes due on Friday. Nasdaq lost 12 points to 5,070.

On the upside

Clean Diesel Technologies (Nasdaq: CDTI) reported encouraging initial results for its Spinel(TM) proprietary clean emissions exhaust technology.

24/7 Wall Street listed Aveo Pharmaceuticals (Nasdaq: AVEO) as one of four overlooked winners of the American Society of Clinical Oncology's annual meeting.

Youku Tudou (NYSE: YOKU) partnered with Disney (NYSE: DIS) to exclusively market online in China the Marvel collection of movies and TV series.

On the downside

Stifel Nicolaus analyt George Askew downgraded Ctrip.com (Nasdaq: CTRP) from a Buy rating to a Hold rating.

Shares of Talen Energy (NYSE: TLN) fell after being spun off from PPL (NYSE: PPL) yesterday.

Investors locked in profits on ImmunoGen (Nasdaq: IMGN).

In the broad market, declining issues outpaced advancers by a margin of more than 5 to 3 on the NYSE and by more than 3 to 2 on Nasdaq. The broader S&P 500 fell 8 points to 2103. Bitcoin added $3 to $226.