1-Ounce Gold Futures Expansion to 24-7 Trading
Effective, Sunday, July 19 (trade date Monday, July 20) CME Group will migrate 1-Ounce Gold futures to a new CME MDP 3.0 channel and market segment to enable 24/7 trading.
1-Ounce Gold futures will trade continuously on CME Globex with at least a two-hour weekly maintenance period occurring on the weekend. All holiday or weekend trading from Friday evening through Sunday evening will have a trade date of the following business day, with clearing, settlement and regulatory reporting processed the following business day.
This topic outlines the necessary information for processing 1-Ounce Gold futures 24/7 trading.
Contents
- 1 Revision History
- 2 Key Events and Dates
- 3 Testing and Certification
- 4 Summary of Impacts
- 5 Product Overview
- 6 24/7 Technical Market Functionality
- 7 Summary of Gateway Connectivity and Configuration Impacts
- 8 iLink Order Entry
- 9 Drop Copy
- 10 Market Data Support
- 10.1 MDP 3.0 Market Data
- 11 Straight-Through Processing
- 12 CME Reference Data API
- 13 Credit and Risk Management
- 14 FirmSoft
- 15 Additional Services
- 16 Summary of Impacts for 5-Day 1-Ounce Gold Futures Trading
- 17 Contact Information
Revision History
Date | Description |
|---|---|
Tuesday, July 7, 2026 | Added Day One Extended Maintenance time. |
Thursday, June 25, 2026 | Changed New Release launch date to Sunday, June 28, 2026. |
Wednesday, June 17, 2026 | Initial publication of this client impact. |
Key Events and Dates
Date | Milestone |
|---|---|
Sunday, June 28 | New Release launch |
Sunday, July 19 | Production 1-Ounce Gold futures migration to new market segment (74) and channel migration (329).
|
4:30 p.m. Central Time on Friday, July 24 | Production 1-Ounce Gold futures weekend trading begins |
Testing and Certification
Certification is not required for customer systems already certified to CME MDP 3.0 Market Data, iLink Order Entry, and Drop Copy 4.0 Service for iLink. However, testing is strongly encouraged.
New Release environment testing is available from Sunday, 5:00 p.m. Central Time (CT) to Friday, 4:00 p.m. CT. Weekend testing is not available.
Summary of Impacts
1-Ounce Gold futures expansion to 24/7 Trading.
New Product group (G1)
Migration of 1-Ounce Gold futures to existing CME MDP 3.0 channel 329.
Channel 329 also includes event contracts.
No other products on CME MDP 3.0 channel 360 will migrate to channel 329.
Market segment (tag 1300-MarketSegmentID) migration from 78 to 74.
New iLink Convenience Gateway (CGW) sessions required to support weekend trading.
Existing iLink CGW sessions will continue to support weekday trading.
New Drop Copy Convenience Gateway (CGW) sessions required to support weekend trading.
Existing Drop Copy CGW sessions will continue to support weekday trading.
Good Till (GT) orders support for 1-Ounce Gold for 24/7 trading.
CME Globex Credit Controls (GC2) updates required to support 24/7 trading weekend limits.
With this launch, block trades will no longer be supported for 1-Ounce Gold futures.
With this launch, 1-Ounce Gold TAS (TG) products will be delisted.
Product Overview
This section provides the product details for 1-Ounce Gold futures.
Product Specifications
Product | MDP 3.0: Tag 6937-Asset | Current iLink / MDP 3.0: Tag 1151-Security Group | Future iLink / MDP 3.0: Tag 1151-Security Group | Included Spreads and Combos: Tag 762-SecuritySubType | Current Market Data Channel MDP 3.0 Tag 1180 - APPLID | Future Market Data Channel MDP 3.0 Tag 1180 - APPLID | Current MDP 3.0: Tag 1300-MarketSegmentID | Future MDP 3.0: Tag 1300-MarketSegmentID |
|---|---|---|---|---|---|---|---|---|
1-Ounce Gold futures | 1OZ | GC | G1 | SP | 360 | 329 | 78 | 74 |
Block Trade Support
With this launch, block trades will no longer be supported for 1-Ounce Gold futures.
TAS Contract Delisting
With this launch, 1-Ounce Gold Futures TAS products will be delisted.
Product | MDP 3.0: Tag 6937-Asset | iLink / MDP 3.0: Tag 1151-Security Group | Market Data Channel MDP 3.0 Tag 1180 - APPLID | MDP 3.0: Tag 1300-MarketSegmentID |
|---|---|---|---|---|
1-Ounce Gold TAS | 1OT | TG | 360 | 78 |
24/7 Technical Market Functionality
The 24/7 technical market functionality site describes technical front-end impacts, maintenance window processing, shutdown/startup procedures and trading schedule examples for weekend trading with CME Group.
CME Globex Maintenance Windows and Market Hours
1-Ounce Gold futures will follow existing 24/7 technical market functionality, maintenance windows and market hours.
Maintenance windows can vary by product and are subject to change; all updates will be communicated via the Globex Notice.
Day One Extended Maintenance
For the first day of 24/7 1-Ounce Gold futures trading (Friday, July 24, 2026) the standard daily maintenance of two minutes will be extended to 30 minutes (4:00 p.m. to 4:30:00 p.m. CT). The first day schedule will be as follows:
Day | Type | Close/Pause | Pre-Open/Open |
|---|---|---|---|
Friday, July 24, 2026 | Day One Extended Maintenance | Close: 4:00 p.m. to 4:02 p.m. CT |
|
1-Ounce Gold Futures Schedule
Day | Type | Close/Pause | Pre-Open/Open |
|---|---|---|---|
Saturday | Extended Maintenance Window | Close: 2:00 a.m. to 3:45 a.m. CT |
|
Monday through Friday | Daily Maintenance Window (with Trade Date roll) | Close: 4:00:00 p.m. to 4:01:00 p.m. CT |
|
Summary of Gateway Connectivity and Configuration Impacts
Market Segment Gateway (MSGW) Market Segment (tag 1300-MarketSegmentID) will migrate from 78 to 74. Consequently clients must migrate their current sessions to new network IPs.
Order Entry Service Gateway (OESGW ID “4” and “2”) will be utilized by clients to register administrative information based on session type (MSGW or CGW). Clients must re-submit their Party Details Definition following the pre-open on Saturday.
Drop Copy for Market Segment Gateway (tag 1300-MarketSegmentID) will migrate from 78 to 74. Consequently clients must migrate their current sessions to new network IPs.
Gateway | Environment | Market Segment ID | Configuration File SFTP Directory | File Name |
|---|---|---|---|---|
Market Segment Gateway | Production | 74 (from segment 78) | /MSGW/Production/Configuration | MSGW_Config.xml
|
New Release | /MSGW/NRCert/Configuration | |||
Certification | /MSGW/Cert/Configuration | |||
Order Entry Service Gateway - MSGW | Production | 4 | /MSGW/Production/Configuration | MSGW_Config.xml
|
New Release | /MSGW/NRCert/Configuration | |||
Certification | /MSGW/Cert/Configuration | |||
Order Entry Service Gateway - CGW | Production | 2 | /MSGW/Production/Configuration | MSGW_Config.xml
|
New Release | /MSGW/NRCert/Configuration | |||
Certification | /MSGW/Cert/Configuration | |||
Drop Copy - MSGW | Production | 74 (from segment 78) | /DCMSGW/Production/Configuration | DCMSGW_Config.xml
|
New Release | /DCMSGW/NRCert/Configuration | |||
Certification | /DCMSGW/Cert/Configuration |
iLink Order Entry
At the beginning of the Saturday extended maintenance window, CME Globex will disconnect all clients' sessions; reset sequence numbers; and cancel resting day orders and mass quotes. Pre-registered administrative information will be removed during the Saturday maintenance window. Clients must re-submit their Party Details Definition following the pre-open on Saturday.
Market Segment Gateway (MSGW)
All existing iLink Order Entry functionality is supported. Client systems may leverage existing iLink MSGW sessions.
Convenience Gateway (CGW)
iLink CGW sessions support seven day markets.
Clients must have a 7-day enabled CGW iLink session to support 7-day trading.
7-day CGW sessions will support all Globex futures and options markets, including 24/7 markets.
5-day CGW sessions can only submit futures and options orders during the weekday.
iLink Session Support Summary
Session Summary | Impact |
|---|---|
MSGW Session | All MSGW sessions can send orders 24/7 on CME Globex. |
5-Day CGW Session | 5-day CGW sessions can only send orders between Sunday 4:05 p.m. and Friday 4:00 p.m. CT. |
7-Day CGW Session | 7-day CGW sessions can send orders 24/7 on CME Globex. |
Drop Copy
All existing Drop Copy 4.0 Service for iLink functionality is supported. At the beginning of the Saturday extended maintenance window, CME Globex will disconnect all clients' sessions and reset sequence numbers.
Drop Copy MSGW Session
All Drop Copy MSGW sessions support 24/7 trading.
Drop Copy CGW Session
Clients must have a 7-day enabled CGW Drop Copy session to support 24/7
7-day CGW target sessions will support all futures and options markets 24/7 on Globex.
5-day CGW target sessions will only be active during the weekday.
Drop Copy Target Session Support Summary
Session Summary | Impact |
|---|---|
7-Day CGW target sessions | 7-day CGW target sessions receive real-time copies of iLink Execution Report and Acknowledgement From CME Globex to Client System for 24/7 activity on CME Globex. |
Market Data Support
This section outlines market data impacts.
MDP 3.0 Market Data
With this launch, the 1-Ounce Gold Futures will migrate from 360 to channel 329. The MDP 3.0 - CME Globex Market Data Channel Guide provides a list of channels for CME Globex. Existing CME Globex MDP 3.0 and 24/7 technical market functionality are supported for this launch.
Product | Environment | CURRENT - Channel ID | NEW - Channel ID | Configuration File SFTP Directory | File Name |
|---|---|---|---|---|---|
1-Ounce Gold futures | Production | 360 | 329
| /SBEFix/Production/Configuration | Config.xml |
New Release | /SBEFix/NRCert/Configuration | ||||
Certification | /SBEFix/Cert/Configuration |
Straight-Through Processing
CME Straight Through Processing supports trade reports for the 24/7 markets.
Service | Environment Connectivity |
|---|---|
FIX | |
FIXML |
CME Reference Data API
CME Reference Data API Version 3 supports 24/7 trading including CME Reference Data API - CME Globex Trading Hours and Holiday Schedules functionality.
An attribute will be added to CME Reference Data API to support 24/7 trading. Clients can use the sevenDayTradingIndicator to identify only 24/7 instruments.
Seven Day Trading Indicator
Endpoint | Attribute Name | Description | Type | Filterable |
|---|---|---|---|---|
Instrument | sevenDayTradingIndicator | A yes/no (Y/N) flag that indicates if an instrument is available for 24/7 trading. | String |  |
Credit and Risk Management
With this launch, CME Globex Credit Controls (GC2) supports unique GC2 weekend limits. Client specified limits may affect weekend GT order cancellation. The GC2 weekday schedule for 5-day clients begins Sunday at 4:05 p.m. CT. At this time, 5-day client systems can start trading. For weekday limits, 5-day clients can trade during the expanded weekday schedule. Weekend credit GC2 limits for 1 oz gold futures should be setup for the COMEX exchange.
7-day clients should follow the standard product schedule.
FirmSoft
The following table outlines FirmSoft availability.
Feature | Weekdays | Weekends |
|---|---|---|
Accessible at: one.cmegroup.com | Accessible at: https://firmsoftweekend.prod.cmegroup.com/ |
Additional Services
Functionality details on all other services, including CME Clearport, CME Direct and CME Datamine, are found in the 24/7 Technical Market Functionality site.
Summary of Impacts for 5-Day 1-Ounce Gold Futures Trading
The following table summarizes impacts for clients who choose not to support 24/7 trading for 1-Once Gold futures.
Type | Impact |
|---|---|
Schedule update | The GC2 weekday schedule for 5-day clients begins Sunday at 4:05 p.m. CT. At this time, 5-day client systems can start trading. For weekday limits, 5-day clients can trade during the expanded weekday schedule. 7-day clients should follow the standard product schedule. |
CME Globex Sunday startup | Currently 5-day 1-Ounce Gold futures clients can utilize CME Globex Start-up Processing. However, due to the new 7-day trading schedule there is no longer a Globex Sunday startup processing cycle. |
Convenience Gateway (CGW) Support | Clients can continue to use 5-day CGW sessions, however, order submission is not available until 4:05 p.m. CT on Sunday. If a client wishes to trade between Friday 4:00 p.m. CT - Sunday 4:00 p.m. CT, a new CGW session must be created. |
Good Till (GT) Order Elimination | If weekend trading is not enabled in CME Globex Credit Controls (GC2), GT orders will be eliminated on Friday at 4:00 p.m. CT. All client systems are encouraged to cancel all 1-Ounce Gold futures GT orders before Friday 4:00 p.m. CT. |
Contact Information
For technical development support, contact Certification Support for Electronic Trading (CSET).
For production requests, please contact the Global Command Center (GCC).
For all other inquiries, please contact Global Account Management (GAM).