Orbital Falls 4% After Sales Forecast Cut: Washington Mover

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Orbital Sciences Corp. fell the most in more than four months after the maker of rockets and satellites lowered its revenue forecast for the year and reported delays in a program to resupply the International Space Station.

Orbital, based in Dulles, Virginia, slid 4 percent to close at $13.58 in New York for the biggest decline since June 1. The shares are down 6.5 percent this year.