Return
The gain or loss on an investment over a period of time.
Absolute Return
The raw percentage gain or loss on an investment.
Relative Return
Return compared to a benchmark or index.
Risk
The uncertainty of returns; possibility of losing money.
Risk-Adjusted Return
Return after accounting for the amount of risk taken.
Volatility
How much an asset’s price fluctuates over time; measured by standard deviation.
Diversification
Reducing risk by holding multiple assets that do not move together.
Correlation
A measure from -1 to 1 showing how two assets move relative to each other.
Covariance
A measure of how two variables move together; similar to correlation but not scaled.
Beta
Measures an asset’s sensitivity to market movements.
Alpha
Excess return generated above what a model (like CAPM) predicts based on risk.
Sharpe Ratio
(Return – Risk-Free Rate) ÷ Volatility; measures risk-adjusted performance.
Time Value of Money
The idea that money today is worth more than the same amount in the future.
Present Value (PV)
The current value of future cash flows discounted at an interest rate.
Future Value (FV)
The value of an investment at a future date given growth/interest.
Discount Rate
The interest rate used to convert future cash flows to present value.
Compounding
Earning interest on principal plus previously earned interest.
Annuity
A series of equal payments made at regular intervals.
Perpetuity
A series of equal payments that lasts forever.
Yield
The income return on an investment, usually expressed as a percentage.
Yield to Maturity (YTM)
Expected total return of a bond if held to maturity.
Bond
A debt instrument where investors lend money to an issuer in exchange for interest payments and principal repayment.
Coupon
The periodic interest payment made by a bond.
Face Value
The amount repaid to the investor at the bond’s maturity.