United Continental Holdings Corporation. boosted the number of bike seats the airline offers add this year, stoking investor concern that the business may hurt its capacity to raise prices.

U.Utes. carriers are going toward their worst monthly stock decrease since June, overwhelmed by plans with United and United states Airlines Group Corporation. to add flights as well as routes. With a recuperation only now under way originating from a two-year slump in their fares, the slide signs anxiety that the rebound may vanish.

“It’vertisements just this sense through investors that we keep adding more and more capacity, and they’re considerably frustrated,” Cowen and Organization. analyst Helane Becker said, directed to recent flights added for Chicago, illinois; Newark, New Jersey; and Ft Lauderdale, Florida.

United now can expect its number of seats to increase as much as 5.5 per cent in the U.S., rather then 2.5 percent, according to slides ready for a conference on Friday. The airline in Feb. 27 introduced the addition of 47 family round-trips and followed by using published flight plans last week showing considerable increases. There were no indications of any offsetting cutbacks, analysts said.

United Boss Oscar Munoz told investors in the JPMorgan Chase & Co. achieving on Wednesday that this boost to volume is “not shoot-from-the thigh.” The new routes in addition to flights are designed to make connectivity at it is hubs and will increase profits immediately.

“And this is what you would want united states to do, this is what you make payment for us for,” Munoz explained.