KEY POINTS
  • American falls to a nearly 2-year low after it trimmed its revenue outlook for the second quarter.
  • Investors have worried about how airlines will cope with a surge in fuel costs.
  • Other airline stocks also fell.
An American Airlines Boeing 737-800 plane takes off from Los Angeles International airport.

American Airlines tumbled more than 8 percent Wednesday to close at a nearly two-year low after the carrier trimmed its forecast for second-quarter revenue growth.

Revenue for each seat it flies a mile, a key revenue metric, likely grew 1 percent to 3 percent in the three months ended in June, down from a previous forecast of 1.5 percent to 3.5 percent growth, due to weakness in the domestic market, American said.