American Airlines Group, Inc. is an American holding company based in Fort Worth, Texas. As a holding company, several airlines are located under the umbrella of the American Airlines Group such as: American Airlines, US Airways, American Eagle, Envoy, Piedmont Airlines and PSA Airlines.
A Failure to deliver also known as fails-to-deliver or FTD occurs when a buyer or seller is unable to meet his trading obligations. FTDs for US listed companies are reported to the SEC and published twice a month. Therefore there is a certain delay between the reporting and the publishing of the data.
Number of shares, 3 months chart