Losses extended at midday

The markets extended its losses during the midday with the Dow tumbling 95 points to 17,321 on disappointing economic data. Nasdaq eased a point to 4,682.

On the upside

Shares of Shake Shack (NYSE: SHAK) more than doubled on its first trading day.

Spark Therapeutics (Nasdaq: ONCE) stock surged in its market debut.

Shares of InfraREIT (NYSE: HIFR) soared on its first trading day.

On the downside

Delays to a new nuclear power plant construction project weighed down shares of Chicago Bridge & Iron (NYSE: CBI).

Greece's newly elected Syriza party announced its opposition to the Skouries gold mine, which Eldorado Gold (NYSE: EGO) had planned to spend $200 million to develop.

KPMG has resigned as Advanced Emissions Solutions' (Nasdaq: ADES) independent accounting firm. The emissions solutions company also warned that it expected to be delisted from the Nasdaq Stock Market for failing to regain compliance.

In the broad market, declining issues outpaced advancers by a margin of more than 2 to 1 on the NYSE and by nearly 5 to 2 on Nasdaq. The broader S&P 500 lost 9 points to 2012. Bitcoin slipped $2 to $227.