American Air lowers key revenue guidance, sending shares down

American Airlines Group Thursday became the second major US airline this week to lower guidance on a closely watched revenue metric, sending shares of several major carriers lower. However, analysts said the forecasts for lower unit revenue at American and Delta Air Lines had different causes, and were not a sign that the air travel market is hitting an unforeseen slump "Things are improving, but at a slower rate than airlines had hoped for," CFRA Research analyst Jim Corridore said, blaming recent market dips on the slow trickle of reports on carriers' performance. American said Thursday before market opening its unit revenue would rise 1.5% to 3.5%, cutting an earlier projection that total revenue per available seat mile would rise 2.5% to 4.5%. <br/>