| Abbreviation | Definition |
|---|---|
| ABK | AMBAC Financial Group, Inc. |
| ABM | ABM Industries Incorporated |
| ABN | ABN Amro Holdings, N. V. |
| ABNPA | ABN Amro Capital Funding Trust I |
| ABNPB | ABN Amro Capital Funding Trust II |
| ABP | Abraxas Petroleum Corporation |
| ABS | Albertson's, Inc. |
| ABT | Abbott Laboratories |
| ABV | Companhia De Bebidas Das Americas |
| ABX | Barrick Gold Corporation |
| ABY | Abitibi-Price, Inc. (formerly Abitibi-Consolidated, Inc.) |
| AC | Alliance Capital Management Holdings, L P |
| ACA | Alabama Power Company |
| ACF | AmeriCredit Corporation |
| ACG | ACM Government Income Fund, Inc. |
| ACI | ARCH Coal, Inc. |
| ACK | Armstrong World Industries, Inc. |
| ACL | Ace, LTD. |
| ACLPA | ACE Capital Trust I |
| ACN | Accenture |