Top Performing Industries For April 21, 2015

At 11:30 am, the Dow dropped 0.29 percent to 17,982.58, the broader Standard & Poor's 500 index moved down 0.06 percent to 2,099.23 and the NASDAQ composite index rose 0.50 percent to 5,019.45. The industries that are supporting the market today are:

This industry rose 2.7 percent by 11:30 am ET. The top performer in this industry was

, which gained 5 percent. Scholastic's trailing-twelve-month revenue is $1.88 billion.

This industry moved up 2.2 percent by 11:30 am. The top performer in this industry was

, which gained 2.6 percent. General Communication announced a partnership with

to provide high-speed access to Alaska's North Slope.

This industry jumped 1.7 percent by 11:30 am. The top performer in this industry was

, which rose 14.8 percent. Biodel shares have dropped 56.63 percent over the past 52 weeks, while the S&P 500 index has gained 11.75 percent in the same period.

The industry gained 1.6 percent by 11:30 am. The top performer in this industry was

, which gained 1.8 percent. CRH's trailing-twelve-month EPS is $0.84.