Worst Performing Industries For July 31, 2014

The Dow dropped 0.99% to 16,712.49, while the NASDAQ composite index fell 1.46% to 4,397.81. The broader Standard & Poor's 500 index declined 1.21% to 1,946.34. The worst performing industries in the market today are:

This industry tumbled 4.83% by 11:00 am. The worst stock within the industry was 3D Systems

, which fell 8.8%. 3D Systems reported downbeat Q2 earnings.

This industry fell 3.23% by 11:00 am ET. Qihoo 360 Technology Co

shares dropped 4.2% in today's trading. Qihoo 360 Tech announced the offering of $900 million convertible senior notes due 2020.

The industry dropped 2.39% by 11:00 am. The worst performer in this industry was hhgregg

, which declined 13.7%. hhgregg reported weaker-than-expected quarterly results and issued a downbeat FY15 earnings forecast.

This industry moved down 2.17% by 11:00 am, with Build-A-Bear Workshop

moving down 2.1%. Build-A-Bear shares have jumped 44.88% over the past 52 weeks, while the S&P 500 index has gained 16.87% in the same period.