NEW YORK ( TheStreet) -- JetBlue ( JBLU) shares slumped Wednesday following the resignation of Chief Financial Officer Ed Barnes. The stock fell 4.5%, or 21 cents, to $4.42 in intraday trading Wednesday. In a statement, JetBlue didn't disclose a reason for Barnes' departure. It does, however, come close to the airline's expected earnings release on Oct. 26. "Under Ed's leadership, our company has benefited from a stronger financial discipline, allowing us to plan a sustainable growth strategy," said Dave Barger, JetBlue's president and CEO, in a press release after the close of trading Tuesday. "The financial team Ed built will continue to serve JetBlue well, and we wish him well in his future endeavors." A spokesman told The Associated Press that Barnes resigned for personal reasons and that his resignation wasn't a surprise. JetBlue's treasurer, Mark Powers, will serve as chief financial officer on an interim basis. Most airline stocks were lower Wednesday, after American Airlines parent AMR ( AMR) reported a third-quarter loss that missed analysts' estimates as fuel costs rose. -- Written by Joseph Woelfel >To contact the writer of this article, click here: Joseph Woelfel >To submit a news tip, send an email to: firstname.lastname@example.org.