| Abbreviation | Definition |
|---|---|
| ASX | Australian Stock Exchange |
| ATD | Automated Trading Desk |
| ATES | Automated Trade Execution System |
| ATL | All Time Low |
| ATM | Amsterdam Treasury Bond Market |
| ATM | At The Market |
| ATM | Automated Trading Machine |
| ATR | Average Trading Range |
| ATS | Alternative Trading System |
| ATS | Automatic Transfer Service |
| ATT | Ability To Trade |
| ATV | Accrued Transaction Value |
| ATX | Austrian Traded Index |
| AUB | Palm, Inc. Options |
| AVS | Automated Valuation Service |
| AZZ | Aztec Manufacturing Company |
| B | Buy |
| BA | Blind Assets |
| BAF | Basal Area Factor |
| BASS | Broker Accounting System of Settlement |