- Across the board
- Acting in concert
- Act of state doctrine
- Active
- Active account
- Active bond crowd
- Active box
- Active fund management
- Active income
- Active Management
- Active portfolio strategy
- Active Return
- Active Risk
- Actual market
- Actuals
- A-D
- Ad valorem tax
- Additional bonds test
- Additional hedge
- Adequacy of coverage
- Adjustable rate
- Adjustable-rate mortgage (ARM)
- Adjustable-rate preferred stock (ARPS)
- Adjusted balance method
- Adjusted basis
- Adjusted debit balance (ADB)
- Adjusted exercise price
- Adjusted gross income (AGI)
- Adjusted present value (APV)
- Adjustment bond
- Administrative pricing rules
- Advance
- Advance commitment
- Advance Computerized Execution System (ACES)
- Advance funded pension plan
- Advance refunding
- Advancement
- Adverse opinion
- Adverse selection
- Advising bank