Financial Glossary
Essential Financial & Options Terms
A beginner-friendly glossary of key financial concepts, options mechanics, and investing terminology. Learn the language of options trading and investing.
Delta
Measures how much an option's price changes relative to a $1 move in the underlying asset. Essential for understanding directional exposure.
Read →Gamma
Measures how fast Delta changes as the underlying asset price moves. Shows the acceleration of option price movement.
Read →Theta
Measures how much an option loses value each day as it approaches expiration. Time decay is a key factor in options profitability.
Read →Vega
Measures how much an option's price changes for each percentage point change in implied volatility. Shows volatility sensitivity.
Read →Implied Volatility
The market's forecast of future price movement, derived from option prices. Higher IV means larger expected swings.
Read →Historical Volatility
A measure of how much an asset has actually moved in the past. Backward-looking, unlike implied volatility.
Read →Volatility Smile
The pattern where implied volatility differs across different strike prices. Reveals market expectations and risk perception.
Read →Call Option
A contract giving the right to buy an underlying asset at a specified price. Profit from rising prices or collect premium.
Read →Put Option
A contract giving the right to sell an underlying asset at a specified price. Profit from falling prices or hedge downside.
Read →Strike Price
The agreed-upon price at which an option can be bought or sold. The exercise price for the underlying asset.
Read →Premium
The price paid for an options contract. Determined by strike, expiration, IV, and underlying price.
Read →Expiration
The date an options contract ends and becomes worthless or can be exercised. Critical for options strategy timing.
Read →Assignment
When an option holder exercises their right and the seller must fulfill the obligation. Common for short positions.
Read →Exercise
When an option holder uses their right to buy or sell the underlying asset. Can happen before or at expiration.
Read →In-the-Money (ITM)
When an option has intrinsic value. Calls ITM when above strike; puts ITM when below strike.
Read →Out-of-the-Money (OTM)
When an option has no intrinsic value. Calls OTM when below strike; puts OTM when above strike.
Read →At-the-Money (ATM)
When an option's strike price equals the underlying asset's current price. Usually has the most optionality.
Read →Dividend Yield
Annual dividends paid by a stock divided by its price, expressed as a percentage. Measures income from stock ownership.
Read →Break-Even
The price at which an investment or trade produces no profit or loss. Critical for options strategy analysis.
Read →Amortization
Paying off a loan through regular payments that cover both principal and interest over time. Common for mortgages.
Read →Dollar-Cost Averaging (DCA)
Investing fixed amounts at regular intervals regardless of price. Reduces timing risk through disciplined investing.
Read →Rebalancing
Adjusting portfolio allocations back to target weights. Maintains risk levels and enforces buy-low, sell-high discipline.
Read →Expense Ratio
Annual cost of owning a fund expressed as a percentage of assets. Lower ratios save money over time.
Read →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.