- Air pocket stock
- Alien corporation
- All equity rate
- All in
- All-in-rate
- All Ordinaries Index
- All or none order (AON)
- All-in cost
- All-or-none underwriting
- All Risk Insurance
- Allied member
- Alligator spread
- Allocation-of-income rules
- Allocational efficiency
- Allotment
- Alpha
- Alpha equation
- Alphabet stock
- Alternative investments
- Alternative Minimum Tax (AMT)
- Alternative mortgage instruments
- Alternative order
- American Association of Individual Investors (AAII)
- American Depositary Receipt (ADR)
- American Depositary Receipt Fees
- American Depositary Receipt Ratio
- American Depositary Share (ADS)
- American option
- American shares
- American Stock Exchange (AMEX)
- American-style option
- Amman Financial Market (AFM)
- Amman Stock Exchange
- Amortization
- Amortization factor
- Amortizing interest rate swap
- Amount outstanding and in circulation
- Amsterdam Exchange (AEX)
- AMTEL
- Analyst