Financial Glossary
Financial & Options Terms, Connected
A practical reference for measuring returns, reading risk, and understanding option contracts. New entries pair definitions with formulas, worked examples, limitations, and a useful next step.
New Reference Layer
Financial Math & Options Mechanics
Each page owns one search job and links to the concepts required before or after it. Existing glossary pages remain unchanged.
Performance & risk
Maximum Drawdown
The largest peak-to-trough percentage decline before a new peak.
Maximum Drawdown definition →Sharpe Ratio
Excess return earned per unit of total return volatility.
Sharpe Ratio definition →Sortino Ratio
Excess return per unit of downside deviation.
Sortino Ratio definition →Beta
Historical sensitivity to movements in a chosen market benchmark.
Beta definition →Alpha
Return beyond the amount predicted by a selected risk model.
Alpha definition →Treynor Ratio
Excess return per unit of systematic risk measured by beta.
Treynor Ratio definition →Information Ratio
Active return over a benchmark per unit of tracking error.
Information Ratio definition →Volatility
Return dispersion, commonly measured by standard deviation and annualized.
Volatility definition →Return measurement
Annualized Return
A multi-period return converted to an equivalent compounded yearly rate.
Annualized Return definition →Internal Rate of Return
The discount rate that makes a cash-flow series have zero net present value.
Internal Rate of Return definition →Extended Internal Rate of Return
Annualized IRR for cash flows occurring on irregular dates.
Extended Internal Rate of Return definition →Money-Weighted Return
Portfolio return reflecting the size and timing of external cash flows.
Money-Weighted Return definition →Time-Weighted Return
Compounded performance with external cash-flow effects removed.
Time-Weighted Return definition →Trading statistics
Profit Factor
Gross trading profit divided by absolute gross trading loss.
Profit Factor definition →Win Rate
The percentage of closed observations classified as profitable.
Win Rate definition →Risk–Reward Ratio
Amount at risk relative to potential reward under stated exits.
Risk–Reward Ratio definition →Options pricing
Intrinsic Value
The amount an option is in the money, floored at zero.
Intrinsic Value definition →Time Value
The portion of option premium above intrinsic value.
Time Value definition →Rho
Option-value sensitivity to a change in interest rates.
Rho definition →IV Crush
A sharp implied-volatility decline after uncertainty is resolved.
IV Crush definition →Options mechanics
Bid–Ask Spread
The difference between the highest displayed bid and lowest ask.
Bid–Ask Spread definition →Open Interest
The number of outstanding option contracts that remain open.
Open Interest definition →Options Volume
The number of option contracts traded during a stated period.
Options Volume definition →Early Assignment Risk
The possibility a short American-style option is assigned before expiration.
Early Assignment Risk definition →American vs. European Options
Exercise styles describing when a contract may be exercised.
American vs. European Options definition →Defined Risk
A position whose maximum modeled loss is bounded under stated assumptions.
Defined Risk definition →Established Library
Options Greeks, Volatility & Investing Basics
Delta
Measures how much an option's price changes relative to a $1 move in the underlying asset. Essential for understanding directional exposure.
Delta definition →Gamma
Measures how fast Delta changes as the underlying asset price moves. Shows the acceleration of option price movement.
Gamma definition →Theta
Measures how much an option loses value each day as it approaches expiration. Time decay is a key factor in options profitability.
Theta definition →Vega
Measures how much an option's price changes for each percentage point change in implied volatility. Shows volatility sensitivity.
Vega definition →Implied Volatility
The market's forecast of future price movement, derived from option prices. Higher IV means larger expected swings.
Implied volatility definition →Historical Volatility
A measure of how much an asset has actually moved in the past. Backward-looking, unlike implied volatility.
Historical volatility definition →Volatility Smile
The pattern where implied volatility differs across different strike prices. Reveals market expectations and risk perception.
Volatility smile definition →Call Option
A contract giving the right to buy an underlying asset at a specified price. Profit from rising prices or collect premium.
Call option definition →Put Option
A contract giving the right to sell an underlying asset at a specified price. Profit from falling prices or hedge downside.
Put option definition →Strike Price
The agreed-upon price at which an option can be bought or sold. The exercise price for the underlying asset.
Strike price definition →Premium
The price paid for an options contract. Determined by strike, expiration, IV, and underlying price.
Premium definition →Expiration
The date an options contract ends and becomes worthless or can be exercised. Critical for options strategy timing.
Expiration definition →Assignment
When an option holder exercises their right and the seller must fulfill the obligation. Common for short positions.
Assignment definition →Exercise
When an option holder uses their right to buy or sell the underlying asset. Can happen before or at expiration.
Exercise definition →In-the-Money (ITM)
When an option has intrinsic value. Calls ITM when above strike; puts ITM when below strike.
In the money definition →Out-of-the-Money (OTM)
When an option has no intrinsic value. Calls OTM when below strike; puts OTM when above strike.
Out of the money definition →At-the-Money (ATM)
When an option's strike price equals the underlying asset's current price. Usually has the most optionality.
At the money definition →Dividend Yield
Annual dividends paid by a stock divided by its price, expressed as a percentage. Measures income from stock ownership.
Dividend yield definition →Break-Even
The price at which an investment or trade produces no profit or loss. Critical for options strategy analysis.
Break even definition →Amortization
Paying off a loan through regular payments that cover both principal and interest over time. Common for mortgages.
Amortization definition →Dollar-Cost Averaging (DCA)
Investing fixed amounts at regular intervals regardless of price. Reduces timing risk through disciplined investing.
Dollar cost averaging definition →Rebalancing
Adjusting portfolio allocations back to target weights. Maintains risk levels and enforces buy-low, sell-high discipline.
Rebalancing definition →Expense Ratio
Annual cost of owning a fund expressed as a percentage of assets. Lower ratios save money over time.
Expense ratio definition →About this glossary
This glossary provides beginner-friendly explanations of financial and options trading terms. Each term includes definitions, context, and links to related calculators and resources to help you apply these concepts.
Educational only: These definitions are educational resources and do not constitute investment advice. Financial terms have nuanced meanings that vary by context; this glossary simplifies them for learning purposes. Real trading and investing involve complexity beyond definitions—consult a qualified financial advisor before making investment or trading decisions.