Glossary
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Definitions in plain English, built to improve decision quality instead of just adding jargon.
Lead termMarch 26, 2026
Bid-Ask Spread
The difference between the highest bid and the lowest ask in a market.
Implied Volatility
March 26, 2026Implied Volatility
The market's expectation of future movement priced into an option contract.
Liquidity
March 26, 2026Liquidity
How easily an asset or contract trades without a large price impact.
Open Interest
March 26, 2026Open Interest
The number of option contracts that currently exist and have not been closed or exercised.
Premium
March 26, 2026Premium
The price paid to buy an option contract or received to sell one.
Volume
March 26, 2026Volume
The number of shares or contracts traded during a given period.