HOW TO READ AN OPTIONS CHAIN
Plain English
An options chain is basically a menu. It shows you every available option for a stock, organized by expiration date and strike price. Calls on the left, puts on the right, with key data like bid, ask, volume, and open interest.
Going deeper
An options chain displays all available contracts for a given stock, organized by expiration date and strike price. Key columns include: Bid (price someone will pay), Ask (price someone will sell for), Last (most recent trade price), Volume (contracts traded today), Open Interest (total outstanding contracts), and Implied Volatility. The chain helps you compare options across strikes and expirations, identify liquidity, and find the right contract for your strategy.
Examples
Reading the Bid-Ask
A call shows Bid: $2.45, Ask: $2.55. If you buy, you'll pay $2.55. If you sell, you'll receive $2.45. The $0.10 difference (spread) is the cost of immediacy. Tighter spreads indicate better liquidity.
Volume vs. Open Interest
A contract shows Volume: 5,000 and Open Interest: 50,000. High volume means active trading today. High open interest means many contracts are being held overnight. Both indicate good liquidity.