American Airlines Group Inc (AAL)

[frozen49th]

On my Fidelity Investment account, the Cost Basis per Share for AAL shares shows as $0.00 for AAMRQ to AAL converted shares, almost half of which are dated either 03/10/2014 and another almost half of which are dated 04/10/2014. Only a small number of shares are dated 12/05/2013 and have a cost basis per share of $28.18. My former AAMRQ shares had a cost basis of approximately $6 per share, and were converted to AAL monthly between December 2013 through April 2014 per AMR/AAL allocation table. Why would most of my AAL show a $0.00 cost basis per share on Fidelity, and why are most of the shares shown to have been acquired in March and April 2014?