Worst Performing Industries For December 31, 2013

At 10:50 am, the Dow surged 0.19% to 16,534.83, the broader Standard & Poor's 500 index moved up 0.23% to 1,845.25 and the NASDAQ composite index rose 0.34% to 4,168.15.The worst performing industries in the market today are:Long Distance Carriers: This industry tumbled 1.58% by 10:50 am. The worst stock within the industry was Elephant Talk Communications (NYSE: ETAK), which fell 8.5%. Elephant Talk's trailing-twelve-month ROE is -91.87%.Medical Practitioners: This industry fell 1.58% by 10:50 am ET. The worst performer in this industry was LCA-Vision (NASDAQ: LCAV), which dropped 1.6%. LCA-Vision's PEG ratio is -5.80.Processing Systems & Products: This industry moved down 0.49% by 10:50 am, with Polycom (NASDAQ: PLCM) moving down 1%. Polycom's trailing-twelve-month profit margin is -0.93%.Diversified Computer Systems: The industry dropped 0.47% by 10:50 am. The worst performer in this industry was Cray (NASDAQ: CRAY), which declined 1.2%. Cray shares have jumped 70.74% over the past 52 weeks, while the S&P 500 index has gained 25.89% in the same period.