Options basics and glossary
The ideas behind every options page on the site: what calls and puts are, how to read an option chain, the Greeks, and what open interest and implied volatility mean.
Questions this topic answers
- How do you read an options chain?
- What do bid IV and ask IV mean on an option chain?
- Where do I see delta, open interest and the other Greeks?
- How do I see the trades in one option?
- Where can I see a historical option chain?
- Are options riskier than stocks?
- How many shares does one option contract control?
- Can you lose more than you invest with options?
- What happens to an option at expiration?
- What is the theoretical value of an option?
- How is theoretical edge calculated?
- Is selling below theoretical value positive or negative edge?
- What does win rate mean on a trade card?
- Is rising open interest bullish?
- When is options open interest updated?
- Was a big trade opening a new position or closing one?
- Which stocks and options added the most open interest?
- Where is a stock's open interest concentrated?
- Where can I get historical data for a single option contract?
- How do I see daily open interest history for an option?
- How has this option's price changed day to day?
- Is this option's implied volatility rising or falling?
- What do sweep, multi-leg and contingent volume mean?
- How actively does this option trade?
Guides
How to Read an Option ChainHow to read an option chain: calls on the left, puts on the right, strikes in the middle. What bid, ask, bid IV, ask IV, volume and the Greeks show.
Stocks vs OptionsStocks vs options: owning shares vs the right to buy or sell them, expiration, leverage and risk, with a worked example of $1,000 in shares or in calls.
Theoretical EdgeTheoretical edge is the gap between an option trade's price and its theoretical value. How we calculate it, the buyer's and seller's sign, and win rate.
Open InterestOpen interest is the number of option contracts still open. How trades change it, when it updates, and what rising open interest does and doesn't mean.
Option Contract Historical DataDaily history for one option contract: trade prices, bid and ask, volume, open interest, implied volatility and trade types for the last 90 trading days.
Option IntroductionIntroduction to stock options including calls, puts, strike, expiration date, underlying, in-the-money, out-of-the-money
GlossaryGlossary of options trading terms - call, put, delta, premium, expiration date, strike price, more
Cost of CarryLearn about cost of carry and its effect on options pricing.
DeltaDefinition of option delta
GammaDefinition of the Gamma stock option Greek
Analyzing an Individual Option ContractThis page provides comprehensive data and analytics for individual option contracts, empowering you to make informed trading decisions.
Bid Ask SpreadLearn about bid ask spread, a critical component to understanding options trading.
ETFs and ETNsLearn about Exchange-Traded Funds (ETFs) and Exchange-Traded Notes (ETNs) with this guide from MarketChameleon
ThetaDefinition of option theta
Option Q & AOption Question and Answer, seeking to answer the most common questions about option pricing and option trading
RhoDefinition of option rho
Watch
Understanding Option Volume Contracts vs Notional Value vs Delta Volume
Dec 19, 2025 Option Gamma Hedging Strategies Explained
Aug 22, 2025 Using Theoretical Value Benchmarks on an Option Chain
Aug 20, 2025 Using Theoretical Value Benchmarks on an Option Chain | Market Chameleon Tutorial
Aug 14, 2025 Option Delta Explained What It Means and How Traders Use It
Jun 24, 2025 Tracking Implied Volatility: By Strike vs. By Delta (What’s the Difference?)
Apr 7, 2025
Dec 19, 2025 Option Gamma Hedging Strategies Explained
Aug 22, 2025 Using Theoretical Value Benchmarks on an Option Chain
Aug 20, 2025 Using Theoretical Value Benchmarks on an Option Chain | Market Chameleon Tutorial
Aug 14, 2025 Option Delta Explained What It Means and How Traders Use It
Jun 24, 2025 Tracking Implied Volatility: By Strike vs. By Delta (What’s the Difference?)
Apr 7, 2025