ARBITRAGE PRICING THEORY (APT)
Back to GlossaryDefinition
A multi-factor asset-pricing model that explains expected returns using sensitivities to several systematic risk factors.
Summary
Arbitrage Pricing Theory (APT) is a financial model that helps predict what an asset's return should be based on multiple risk factors that affect the entire market. Unlike the Capital Asset Pricing Model (CAPM) which uses only one factor (market risk), APT considers several systematic risk factors like inflation, interest rates, GDP growth, or oil prices. The theory suggests that if an asset's actual return differs significantly from what APT predicts, arbitrage opportunities exist where investors can profit from price corrections.
Usage Context
Essential when studying portfolio theory, asset valuation, risk management, and understanding how multiple economic factors influence security prices. Critical for advanced investment analysis and portfolio construction strategies.
Common Confusions
- Confusing APT with CAPM - APT uses multiple factors while CAPM uses only market risk
- Thinking APT eliminates all risk - it only accounts for systematic risk factors
- Assuming the factors are the same for all assets - factor sensitivities vary by asset
- Believing APT guarantees arbitrage profits - it only identifies potential opportunities
- Mixing up factor sensitivity with factor returns
