Midday Movers: CSC, MRO, DTV & More

Take a look at some of Tuesday's midday movers:

Earnings and earnings guidance drove market action on Election Day.

Computer Sciences hit a 52-week high after the technology services provider crushed earnings estimates for the quarter and raised its full-year guidance.

Marathon Oil rallied after the energy company posted strong quarterly earnings on increased oil and gas production.

Meanwhile, corporate earnings from media companies were mostly negative.

Discovery Communications disappointed investors after the media company lowered its full-year outlook but said it sees stronger growth in advertising for the fourth quarter.

DirecTV reported third quarter revenue that grew by 8 percent compared to a year ago but subscription additions were less than expected, sending shares lower.

Dish Network reported an unexpected third-quarter loss, but shares were still higher.

Cablevision slumped after the cable and news company said the aftermath from Superstorm Sandy will cost more than the $16-million the firm suffered from last year's Hurricane Irene.

(Read More: See CNBC's Market Insider Blog)

—By CNBC's Lori Spechler.

Questions? Comments? Email us at marketinsider@cnbc.com