United Airlines drops most in almost 6 years after weak forecast

United Continental fell the most in almost 6 years after a weak revenue forecast sparked concern that the airline is struggling to catch up with its rivals’ financial performance. The carrier sank 10% Thursday in New York after tumbling as much as 12%, the biggest intraday drop since May 2010. United’s decline was the largest on the Standard & Poor’s 500 Index and helped drag down other airline stocks. United is falling behind Delta Air Lines in passenger revenue for each seat flown a mile amid intense domestic competition and softer demand abroad. United estimates that so-called unit revenue will decline 6.5% to 8.5% in Q2, deeper than the 2.5% to 4.5% drop anticipated by Delta. “The core of United’s Q2 guide appears softer than expectations,” an analyst at JPMorgan Chase said in a note to clients. <br/>