On Tuesday, investment banking company Jefferies downgraded its rankings on Delta, American Airlines, Southwest Airlines, and Air Canada. That caused airline stocks to drop. American Airlines (NasdaqGS: AAL) finished the day down 2.4%, Delta (NYSE: DAL) dropped 2.7%, and Southwest Airlines (NYSE: LUV) fell 5.9%. Even United Airlines (NASDAQ: UAL), which remains the only U.S. airline Jefferies still considers a “buy,” is down 1.2%.

Jefferies analyst Sheila Kahyaoglu

© Fast Company