Broad decline in airline stocks on margin concerns

• Airline stocks take another beating after yesterday's warning from Lufthansa on pricing continues to sour the mood on the group and the prospect of higher oil prices crops up with Iraqi in chaos.
• Regional carriers in the U.S. aren't being spared in the broad sell-off.
• Decliners: United Continental (NASDAQ:UAL) -5.7%, Southwest Airlines (NYSE:LUV) -4.5%, Delta Air Lines (NYSE:DAL) -5.1%, JetBlue (NASDAQ:JBLU) -3.9%, Alaska Air Group (NYSE:ALK) -3.4%, American Airlines Group (NASDAQ:AAL) -6.4%, Allegiant Travel (NASDAQ:ALGT) -3.7%, Hawaiian Holdings (NASDAQ:HA) -4.1%.