- Approved list
- APS
- Arbitrage
- Arbitrage bonds
- Arbitrage-free option-pricing models
- Arbitrage Pricing Theory (APT)
- Arbitrage Trading Program (ATP)
- Arbitrageur
- Are you open?
- Arithmetic average (mean) rate of return
- Arithmetic mean return
- Arizona Stock Exchange
- Arm's length price
- Arms index
- Around us
- Arranger
- Arrearage
- Articles of incorporation
- Artificial currency
- Artificial Intelligence
- Ascending tops
- Asia-Pacific Economic Cooperation Pact (APEC)
- Asian Currency Units (ACU)
- Asian Development Bank
- Asian dollar market
- Asian option
- Ask
- Asked price
- Asked to bid/offer
- Aspirin
- Assay
- Assessed valuation
- Asset
- Asset activity ratios
- Asset allocation decision
- Asset allocation mutual fund
- Asset-backed security
- Asset-based financing
- Asset classes
- Asset-coverage test