| Abbreviation | Definition |
|---|---|
| AMF | ACM Managed Income Fund, Inc. |
| AMG | Affiliated Managers Group, Inc. |
| AMH | Amerus Life Holdings, Inc. |
| AML | AMLI Residential Properties Trust |
| AMN | Ameron International Corporation of Delaware |
| AMO | Alliance All-Market Advantage Fund |
| AMR | American Airlines (former) |
| AMR | AMR Corporation of Delaware |
| AMT | American Tower Corporation |
| AMU | ACM Municipal Securities Income Fund, Inc. |
| AMZ | American Medical Security Group, Inc. |
| AN | Automation, Inc. of Delaware |
| ANBPA | Abbey National, PLC. Preferred A |
| ANF | Abercrombie & Fitch Company |
| ANJP | ANZ Exchangeable Preferred Trust II |
| ANN | AnnTaylor Stores Corporation |
| ANS | Airnet Systems, Inc. |
| ANZ | Australia & New Zealand Banking |
| ANZP | Australia & New Zealand Banking Preferred |
| AOC | AON Corporation |