Block trade (futures)
A futures block trade is a large transaction privately negotiated away from the central order book and then reported to the exchange, allowed only in eligible products and above a minimum size. It appears in the exchange's reported volume, but it never rested in the displayed book and did not interact with the orders you saw on the DOM.
Senzoukria · Glossary · Updated September 2026
Definition
The CFTC glossary describes a block trade as a large transaction negotiated off an exchange's centralized trading facility. On CME Group exchanges block trades are governed by the block trade rule (CME Rule 526): they are permitted in designated products, must meet a minimum quantity threshold set per product, must be at a fair and reasonable price, and must be reported to the exchange within a set time.
How it differs from a large order in the book
| Block trade | Large order on the book | |
|---|---|---|
| Negotiation | Private, between the parties | None: anonymous matching |
| Visible before execution | No | Resting size or aggression is visible |
| Price | Agreed, may be away from the current bid and ask | Whatever the book offers |
| Appears in volume | Yes, once reported | Yes, immediately |
| Moves the book | Not directly | Consumes resting liquidity |
Worked example
Hypothetical: ES quotes 5,000.25 bid and 5,000.50 offered. A block of 500 contracts is reported at 5,000.00. The print is below the bid, the book did not change, and no resting order at 5,000.00 was filled. Treating it as 500 contracts of aggressive selling would be wrong on both counts: it had no aggressor on the book and it did not trade at the displayed market.
What it means for order flow
Blocks transfer large risk without revealing it in advance, so their participants often hedge or unwind on the central book before or after. That hedging, not the block itself, is what the footprint can show. Whether a block reaches your tape at all, and how it is marked, depends on how your data feed treats reported trades.
In Senzoukria
The application does not tag futures block trades. Its footprint and time and sales show the trades the connected feed delivers, and its Big Trades bubbles merge prints of the same price and side within a 100 ms window; a reported block that the feed passes on would be drawn like any other print of its size.
Common mistakes
- Reading a reported block as a market order that swept the book.
- Drawing support or resistance at a block's price as if liquidity had been tested there.
Related
In the same section
Sources
- CFTC glossary (2026-09-25)
This page in other languages
Frequently asked questions
- Are futures block trades the same as options block trades?
- The principle is the same, a large privately negotiated trade reported to the exchange, but each product family has its own eligibility and minimum sizes. The glossary entry on block trades in options covers how they appear on the options tape.
- Can a block trade move the market?
- Not directly, since it does not trade against the book. The hedging and positioning around it can, and that activity is what appears in the central order flow.