Market context
CFTC's Friday VIX COT Report Is a Tuesday Snapshot
CFTC updated its combined CBOE report on 28 August 2026, while the VIX futures positions in that report were marked as of 25 August. A COT record needs both dates before it can sit beside options-market data.
CFTC's Friday VIX COT Report Is a Tuesday Snapshot
On Friday, 28 August 2026, the Commodity Futures Trading Commission updated its combined CBOE Commitments of Traders report. The VIX futures section carries two dates: the page says it was updated on 28 August, and its heading says "Option and Futures Combined Positions as of 08/25/26." It reports 378,693 contracts of open interest for that Tuesday record.
The dates describe different jobs. Tuesday, 25 August is the observation date. Friday, 28 August is when the CFTC made the weekly report available. Treating the Friday update as a reading of Friday positioning would move the data three calendar days forward without evidence.
Friday, 28 August 2026 was the latest completed U.S. options-market session when this article was prepared on Sunday, 30 August in Australia/Brisbane. This article examines the CFTC report's timing and scope. It makes no claim about Friday's VIX level, VIX options activity, equity-option volume, dealer activity, implied volatility or a market direction.
The report contains two dates and one market record
The CFTC says its weekly COT reports break down each Tuesday's open interest in futures and options on futures markets where 20 or more traders hold positions at or above its reporting levels. Its release schedule says the reports are generally published on Friday at 3:30 p.m. Eastern Time using data from the immediately preceding Tuesday. The 2026 schedule listed Friday, 28 August as a release date.
The August CBOE report offers a concrete example of that cadence.
| Field | Value | What it identifies |
|---|---|---|
| Position observation date | Tuesday, 25 August 2026 | The COT record's Tuesday open-interest snapshot |
| CFTC page update | Friday, 28 August 2026 | The date the current combined CBOE page was updated |
| Scheduled COT release time | 3:30 p.m. Eastern Time | The CFTC's usual Friday publication time |
| VIX futures open interest in the record | 378,693 contracts | The value shown in the combined report for 25 August |
The 378,693 figure is an observed figure from the CFTC report. It is not a Friday close, a Friday option-chain reading or a signal about the next session.
Wednesday and Thursday sit between the snapshot and the release
The public report arrives after two intervening U.S. trading sessions have completed. It retains Tuesday's observation point because that is the report's stated data date. The gap is an attribute of the series, not a flaw to be repaired with a Friday label.
For a ten-year-old version, picture a class photograph taken on Tuesday and handed out on Friday. Friday is when the class receives the photograph. It does not turn the picture into a Friday photograph. The observation date and the delivery date remain useful for different questions.
That distinction matters when COT is placed beside market data. A Friday chart, Friday settlement or Friday options-volume figure belongs to Friday. A COT position reported on Friday belongs to its Tuesday observation date. A research log can contain both records, provided their dates stay attached.
A worked example shows the record-keeping problem
The following numbers are a model, not CFTC data and not an estimate of VIX positioning. They show why a later publication date cannot substitute for an earlier observation date.
| Day | Hypothetical reportable position | Change from prior day | Status |
|---|---|---|---|
| Tuesday, 25 August | 100 contracts | Baseline | COT observation point |
| Wednesday, 26 August | 120 contracts | +20 contracts | Assumed later activity |
| Thursday, 27 August | 110 contracts | -10 contracts | Assumed later activity |
| Friday, 28 August | 100 contracts in the COT report | 0 in the report | Tuesday value released on Friday |
The model output for the Thursday balance is 100 + 20 - 10 = 110 contracts. The Friday COT report would still state the Tuesday value of 100 contracts. It does not update the model's Wednesday and Thursday activity, because neither number is an input to that Tuesday report.
The calculation offers a narrow lesson: a Friday date can identify when a report became public, while Tuesday identifies what the report observed. It cannot establish the unobserved path between those points.
The COT scope comes before an options inference
COT is a CFTC large-trader report for futures and options on futures. The CFTC provides Futures Only and Futures-and-Options-Combined series, and the report type belongs with the observation date in any record. A reader who needs same-day equity, ETF or index-option chain figures needs the relevant exchange or market-data source for that question.
The combined CBOE report is therefore a bounded positioning record. It can inform research about the stated futures-and-options-on-futures market at the stated Tuesday snapshot. It does not provide an all-market count of listed options activity, and it does not establish the purpose behind a trader category's position.
Five fields keep the timing intact
An event note can preserve the COT report without turning a weekly observation into a same-day market claim:
- As-of date: Tuesday, 25 August 2026 for this report.
- Public release date and time: Friday, 28 August 2026 and the CFTC's usual 3:30 p.m. Eastern Time schedule.
- Report family: Futures Only or Futures-and-Options-Combined.
- Market and unit: the named market, contract description and reported unit.
- Measure: open interest, position category, change field or another named COT field.
Holidays can alter the CFTC schedule. The Commission says a federal holiday may delay a release by one or two days, so the official schedule and the report page warrant a fresh check before a dated comparison.
The decision rule
Store a COT observation under its Tuesday as-of date and store the Friday publication timestamp beside it. Compare it with data from the same observation date before drawing any market conclusion. That rule preserves the report's value while keeping a weekly position snapshot separate from the session in which it became public.
This article provides general education and offers no position, strike, expiry or trading action.
Sources
- CFTC Commitments of Traders Report, CBOE Futures-and-Options-Combined, updated 28 August 2026
- CFTC Commitments of Traders reports and methodology
- CFTC 2026 COT release schedule
- CFTC historical viewable reports
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Frequently asked questions
Why does a Friday COT release describe Tuesday positions?
The CFTC's reports generally publish Friday at 3:30 p.m. Eastern time using data from the previous Tuesday, so the report's public-release date and observation date serve different purposes.
Does the CFTC VIX COT report measure same-day options activity?
No. The cited report is a futures-and-options-on-futures large-trader positioning record with a stated Tuesday observation date, not a same-day equity, ETF or index-options chain reading.
Sources
Verified August 30, 2026
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