Encyclopedia DeFi · Entry 344
Open interest versus volume: outstanding contracts and completed trades
In this article
At a glance
Key facts
| Fact | Detail | Source |
|---|---|---|
| Stock measure | Open interest describes outstanding contracts at a point in time. | [1] |
| Flow measure | Volume counts trading during a period. | [1] |
| Different questions | Turnover and remaining exposure need not move together. | [1] |
Count a matched contract once
In a simplified market, a new buyer and a new seller open one matched contract: volume increases by one and open interest increases by one. There is a long and a short, but this is one outstanding contract, not two.
If an existing long transfers its position to a new buyer while the original short remains, trading volume increases but the outstanding count need not change. When both counterparties close corresponding exposure, open interest decreases.
Read the unit and timestamp
A dashboard may report contracts, underlying units or a currency valuation. Price changes can alter a currency-valued display even if the contract count is unchanged. Compare like units and the same observation times; a 24-hour volume figure cannot be directly equated with end-of-day open interest.
Activity is not a sufficient forecast
Every outstanding matched contract has opposing sides. Increasing open interest can accompany different strategies, including hedges and spread trades. CME discusses using it with other analysis; it does not make a standalone count a dependable buy-or-sell signal.
Direct answers
Questions people ask
Can volume be high while open interest stays flat?
Yes. Existing exposure can be repeatedly transferred, or openings and closings can offset over the period.
Inspect the evidence
The answer and key facts have stable claim links. These records retain the scope and qualification when reused.
Open interest counts derivative contracts that remain outstanding. Volume counts contracts traded during a specified period. The same exposure can change hands repeatedly and generate substantial volume without increasing open interest; neither measure alone identifies whether future prices will rise or fall.
Scope: DeFi · data through 2026-10-02. Verification: verified · 2026-10-02T19:18:00.092Z.
Link to this claimStock measure: Open interest describes outstanding contracts at a point in time.
Scope: DeFi · data through 2026-10-02. Verification: verified · 2026-10-02T19:18:00.092Z.
Link to this claimFlow measure: Volume counts trading during a period.
Scope: DeFi · data through 2026-10-02. Verification: verified · 2026-10-02T19:18:00.092Z.
Link to this claimDifferent questions: Turnover and remaining exposure need not move together.
Scope: DeFi · data through 2026-10-02. Verification: verified · 2026-10-02T19:18:00.092Z.
Link to this claimRevision history
- — First publication after primary-source research and separate automated verification.
Source register
Sources and references
Retrieval dates and locators are recorded individually.- Open InterestCME Group
Definition of outstanding contracts; not a forecast of price direction.
Locator: Understanding Open Interest · Version / scope: Documentation retrieved 2026-10-02; hash recorded · Retrieved: 2026-10-02T18:57:10.036ZOpen source
Research and drafting use AI assistance. A separate automated review checks claims against primary sources; no external expert or named human review is implied. Publication, substantive editing, source retrieval and verification are recorded separately. This version was independently checked by an automated reviewer on 2 October 2026.
Editorial method and correctionsDegrees of Satoshi editorial project. “Open interest versus volume: outstanding contracts and completed trades.” Published 2026-10-02; updated 2026-10-02. https://degreesofsatoshi.com/encyclopedia/open-interest-vs-volume/