Results for "open interest"

Quick answer

Open interest

The number of option contracts still open at the end of a trading day. It is published the next trading morning, so a rise after heavy volume means new positions were opened and a fall means positions were closed.

Read the open interest guide

Tools

Guides

Open InterestOptions basics and glossary · Open 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. How to Tell If an Option Spread Was Opened or ClosedFollow option trades and order flow · The morning after a trade, the Multi-Leg Trade Screener checks every leg's open interest and labels each spread Opening, Closing or Rolling. Here is how to read it. Legged Option SpreadsFollow option trades and order flow · Find option spreads that traders put on as separate trades - verticals, straddles, strangles, risk reversals, calendars and clusters - with the next morning's open interest and every leg's details. How to Read an Option ChainOptions basics and glossary · How 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. Option Contract Historical DataOptions basics and glossary · Daily 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 Block Trades ScreenerFollow option trades and order flow · Large option trades as they print: how the Option Block Trades Screener picks trades of $10,000 or more in premium, the side of the market each traded on, what each column means and what is free. Options By Expiration ScreenerFollow option trades and order flow · Compare option expirations across stocks and ETFs: at-the-money implied volatility and today's change, the implied straddle, skew, historical volatility, volume and open interest, one row per stock and expiration. Single Leg Trade ScreenerFollow option trades and order flow · Standalone option trades added up by contract: how the Single Leg Trade Screener sizes traders, labels trades bought or sold, reads the next morning's open interest for opening and closing trades, and finds legged spreads.

Videos

Multi Leg Option Spread Analysis Tracking Open Interest Positioning
Mar 31, 2026 How to Analyze Spread Trades Using Open Interest Multi Leg Activity
Mar 12, 2026 Visualizing Open Interest Changes by Expiration Month
Sep 16, 2025 How to Analyze Option Open Interest and Connect It to Trading Action
Mar 13, 2025 Analyzing Options Open Interest Using Market Chameleon
Feb 5, 2025 Open Interest Changes
Dec 21, 2021

Have a question about a specific stock?

Ask AI answers from our data - use the Ask AI button at the top of the page.

Market Data Delayed 15 Minutes