Critical Updates

24/7 Maintenance Window Schedule Extension - This Week

On this Saturday, September 19, CME Group will temporarily extend the Saturday maintenance window schedule for 24/7 markets from 2:00 a.m. – 8:00 a.m. CT. 

Following the extension, the Saturday maintenance window will revert to its 2:00 a.m. – 4:00 a.m. CT standard schedule.

Maintenance Window Schedule Extension
Channel Name	Market Segment ID (tag 1300-MarketSegmentID)	MDP Channel Number
CME Crypto Futures	74	326
CME Crypto Options		327
Event-Based Contracts		329
Event Contracts II	90	333

New Market Data Channel 335 for CME FSPI Sports Index Futures - September 27

Effective Sunday, September 27, CME Group will launch a new market data multicast group to support CME FSPI Sports Index futures.

This new multicast group will utilize Channel ID 335.

Please use your CME Group Login to review network specifications to manage firewall policies and network configurations.

Please review the client impact assessment for product details and 24/7 functionality.

These futures are currently available for customer testing in New Release.

UpdateChanges to iLink On-Demand Party Details for Order Mass Cancel - October 4

† Denotes update to the article

Starting †Sunday, October 4 (trade date Monday, October 5), CME Group will implement iLink messaging changes to on-demand administrative information for the iLink Order Mass Action Report (tag 35-MsgType=BZ) to consistently return customer account information.

On-Demand Party Detail Definition Request Acknowledgment

Population of tag 1691-PartyDetailID for the Customer Account Party Detail Role (tag 1693-PartyDetailRole=24) on the Party Details Definition Request Acknowledgment (PDDRA, tag 35-MsgType=CY) will always reflect the value from the Party Details Definition Request (PDDR, tag 35-MsgType=CX).

Currently, the tag 1691-PartyDetailID on the PDDRA is populated only when tag 6115-MassCancelRequestType=101 (Account) is sent in the Order Mass Action Request (tag 35-MsgType=CA).

iLink Party Details Definition Request Acknowledgment
Tag 1693-PartyDetailRole	Submitted Tag 1691-PartyDetailID	Submitted tag 6115-MassCancelRequestType	Current Return Tag 1691-PartyDetailID Value Behavior	New Return Tag 1691-PartyDetailID Value Behavior
24 (Customer Account)	ABCDE	≠ 101	Not Present	ABCDE
ABCDE	= 101	ABCDE	ABCDE

This change is only applicable to on-demand administrative information. Pre-Registered Party Detail Definition Request Acknowledgment messages sent from the Order Entry Service Gateway remain unchanged.

TransactTime Precision Update

With this change, tag 60-TransactTime on the iLink Order Mass Action Report (tag 35-MsgType=BZ) will be sent with nanosecond precision. This timestamp is currently sent in milliseconds.

iLink On-Demand Party Details for Order Mass Cancel and TransactTime Precision changes Launch Schedule
iLink Gateway	Market	Market Segment ID	Description	Production
Market Segment Gateways	Listed Derivatives - Futures	68	CME and CBOT Equity Futures - excludes E-mini S&P	†October 4
		78	NYMEX Metals, Softs, Alternative Markets, Nat Gas, Non-Crude Energy and Emissions Futures - COMEX Futures
		84	CBOT Interest Rate Futures	†October 11
		88	CME FX Futures
		62	CME Single Stock Futures	†November 1
		64	CME Equity Futures - E-mini S&P
		70	CME, CBOT and MGEX Commodity Futures
		71	CME Livestock Futures
		80	NYMEX Crude and Crude Refined Energy Futures - DME Futures
		82	CME and CBOT Interest Rate Futures
	Listed Derivatives - Options	TBD
Convenience Gateways	Listed Derivatives	TBD

Drop Copy encapsulated payload messages will also reflect these iLink messaging changes.

Additional details regarding Mass Order Cancel can be found on the CME Group Client Systems Wiki.

These changes are currently available for customer testing in New Release.

UpdateTreasury Link Spreads on CME Globex - Q4 2026

† Denotes update to the article

In Q4 2026, pending regulatory review, CME Group will introduce Treasury Link (cash versus futures) spreads for trading on CME Globex. 

This offering represents a price differential between BrokerTec U.S. Treasury Actives offered on BrokerTec Chicago and CBOT U.S. Treasury futures, facilitating the simultaneous and atomic execution of both legs within a single transaction, eliminating legging risk. 

Treasury Link spreads will be listed with 1 to 1 Ratio and DV01 Weighted (X:Y) Ratio. For more information, view the Treasury Link Spreads - Product Specifications. 

For technical specifications, launch timelines, connectivity instructions, and revision history of changes since initial publication, review the †client impact assessment.

Use your CME Group Login to view market data multicast IP and port details on the Connectivity and Configuration Details page.

These products will be available for customer testing in New Release on Monday, October 5.

CME Globex Migration to Google Cloud - Q4 2026

Listed Derivative markets on the CME Globex platform are migrating to Google Cloud’s Ultra Low Latency (ULL) Solution to deliver a more flexible, scalable, and resilient trading ecosystem for clients. By combining Google Cloud’s ULL infrastructure with industry-leading Globex execution capabilities, this transition will unlock expanded co-location options, real-time data analytics, and enhanced operational efficiency to better support your needs. Maintaining market integrity and operational continuity remains our highest priority; we are dedicated to supporting you throughout every phase of this migration with robust testing sandboxes, transparent roadmaps, and dedicated support to deliver a reliable transition.

In response to client interest, CME Group is extending the Sandbox-Dallas Pilot Program for clients who achieve specific technical milestones in the Sandbox-Dallas environment. The first 50 participants to complete each obligation by Wednesday, September 30, and submit proof will earn a stipend. Details on this program are available in the CME Globex Sandbox-Dallas Pilot Program Agreement.

To provide clients with a real-world production environment on Google Cloud prior to the Chicago region launch, Livestock futures and options will migrate to a new Production-Dallas environment in the private zones of the Dallas region in Q4 2026. In the second half of 2028, Livestock futures and options will migrate to the Production-Chicago environment, in the private Google Cloud Chicago region.

To support market access and the Dual Zones Solution, CME Group offers new discovery services via REST API for easing client network connectivity management. CME Group now offers the CME Globex Discovery Service - Configuration API. Clients can use this REST API endpoint to programmatically retrieve IP address configurations for MDP channels, MSGW, and Drop Copy gateways in the Sandbox environment. The CME Globex Discovery Service - Zone Schedule API is also available, to determine which zone is currently Active and when the next zone swap is scheduled to occur.

Information on compute pricing for U4C Bare Metal and U4S Virtual Machine instances is available now from Google Cloud’s Account Teams. To support the migration and the testing of U4 machines specifically, Google Cloud customers may opt in to a Google Cloud incentive program that provides up to $30,000 in credits for U4 compute usage. More information on this program is available from your Account Team or contact exchanges@google.com.

Stay Informed

Ensure your team is subscribed to CME Globex Notices by email and RSS feed for ongoing updates.

Decommission of IKEv1 Client Internet Connections - January 1

Effective Friday, January 1, Internet Key Exchange version 1 (IKEv1) will no longer be supported for all client internet connections. This includes Client Internet Link, CME Certification Virtual Private Network (CERT VPN) and CL2 Cert VPN.

Please view the minimum requirements for CME Group internet connectivity.

An upgrade to Internet Key Exchange version 2 (IKEv2) requires coordination with our network team. Please contact CME Group Global Account Management at CMEDHGroup@cmegroup.com for questions or an IKEv2 upgrade.

Position Reporting Under CFTC Part 17

On April 30, 2024, the Commodity Futures Trading Commission ("CFTC") approved final rules to amend its Large Trading Reporting Regulations for Futures and Options. The amendments were made to modernize CFTC's Large Trader Reporting process and align it with other reporting structures outlined in CFTC regulations.

Since October 2024, CME Group has offered methods to retrieve its instrument listing containing the Unique Instrument Code (UIC) and other instrument data elements in compliance with the amended rule.

Starting March 10, 2025, CME Group began accepting test files in the new Position Message FIXML format via SFTP. For details regarding submitting the new FIXML Position Message, file management, field validations, and example scenarios, please refer to the information in the CME Group Client Systems Wiki.

CFTC's final rules became effective upon publication in the Federal Register on June 3, 2024. Subject to the conditions of the January 27, 2026, no-action letter, reporting firms must comply with these CFTC regulations by July 26, 2027.

A test environment for Large Trader Reporting is now available within the Firm Regulatory Portal (FRP UT). Users can access the testing portal at: https://frp.uat.cmegroup.com.

A brief video demonstration is available to highlight the new look and functionality of the FRP UT.

The Market Regulation Department will be publishing further guidance regarding Large Trader Reporting in subsequent Special Executive Reports as solutions become available.

Support Contacts

• To request access to FRP UT, please contact the Enterprise Application & System Entitlements (EASE) team.
• For questions or comments regarding FRP UT, please contact LTR_Part17_Alerts@cmegroup.com.
• For questions about trade practice rules, please contact MarketReg.Outreach@cmegroup.com.

Product Launches

Listing of Five CME and One CBOT E-mini Factor Futures Contracts - This Week

Effective this Sunday, September 20 (trade date Monday, September 21), pending completion of all regulatory review periods, five CME and one CBOT E-mini Factor futures contracts will be listed for trading on CME Globex and for submission for clearing via CME ClearPort.

The corresponding fixing prices are sent on CME Data Insights - Settlements & Valuations channels via Market Data Platform (MDP) 3.0 Market Data Incremental Refresh (tag 35-MsgType=X) message types with the following attributes:

• Tag 279-MDUpdateAction will be set to 0 = New
• Tag 269-MDEntryType will be set to 6 = Settlement Price OR 269-MDEntryType will be set to W = Fixing Price
• Tag 5796-Trading Reference will display the date for which the marker price was calculated

These products are currently available for customer testing in New Release.

These contracts are listed with, and subject to, the rules and regulations of CME and CBOT.

NewListing Cycle Expansion for Crack Box Spreads - September 27

Effective Sunday, September 27 (trade date Monday, September 28), the listing cycle for the following Crack Box spreads will be expanded on CME Globex.

Listing Cycle Expansion for Crack Box Spreads
Product	MDP 3.0: tag 6937-Asset	iLink/MDP 3.0: tag 1151 - Security Group	MDP 3.0: tag 762-SecuritySubType	Current Listing Schedule	New Listing Schedule
RBOB/Brent Crack Spread Box	RB	CL	CB - Crack Box	Consecutive month spreads and any Jun/Dec, Dec/Jun, Dec/Mar, Mar/Jun, Jun/Sep, Sep/Dec in the nearest 13 months.	All combination for the nearest 6 months. All consecutive month spreads and any Jun/Dec, Dec/Jun, Dec/Mar, Mar/Jun, Jun/Sep, Sep/Dec in the nearest 13 months.
RBOB/WTI Crack Spread Box
ULSD/Brent Crack Spread Box	HO
ULSD/WTI Crack Spread Box

These spreads will be available for customer testing in New Release on this Sunday, September 20.

These contracts are listed with, and subject to, the rules and regulations of NYMEX.

UpdateWeekly Micro WTI Options - October 4

† Denotes update to the article

Effective Sunday, October 4 (trade date Monday, October 5), pending completion of all regulatory review periods, Weekly Micro WTI options will be listed for trading on CME Globex and for submission for clearing via CME ClearPort.

Weekly Micro WTI Options
PRODUCT	MDP 3.0: TAG 6937-ASSET	iLink/MDP 3.0 Tag 1151 - Security Group	MARKET DATA CHANNELMDP 3.0 TAG 1180 - APPLID
Micro Crude Oil Monday Weekly Option	MM1-MM5	M8 (UDS: M9)	383
Micro Crude Oil Tuesday Weekly Option	†MV1-MV5	M8 (UDS: M9)
Micro Crude Oil Wednesday Weekly Option	MP1-MP5	M8 (UDS: M9)
Micro Crude Oil Thursday Weekly Option	MX1-MX5	M8 (UDS: M9)

These options are currently available for customer testing in New Release.

These contracts are listed with, and subject to, the rules and regulations of NYMEX.

Wind Power Futures and Options - October 4

Effective Sunday, October 4 (trade date Monday, October 5), pending completion of all regulatory review periods, Wind Power futures and options will be listed for trading on CME Globex and for submission for clearing via CME ClearPort.

Wind Power Futures and Options
PRODUCT	MDP 3.0: TAG 6937-ASSET	iLink/MDP 3.0 Tag 1151 - Security Group	MARKET DATA CHANNEL MDP 3.0 TAG 1180 - APPLID
US ERCOT Wind Power 2022 Futures	WPE	WX	386
US ERCOT Wind Power 2022 Option	OWE	1W (UDS: 2W)	387
US ERCOT Wind Power 2022 3-Month Strip Option	WES	1W (UDS: 2W)	387
Germany Wind Power 2019 Futures	WPG	WX	386
Germany Wind Power 2019 Option	OWG	1W (UDS: 2W)	387
Germany Wind Power 2019 3-Month Strip Option	WGS	1W (UDS: 2W)	387
Germany Wind Power 2022 B Futures	WPH	WX	386
Germany Wind Power 2022 B Option	OWH	1W (UDS: 2W)	387
Germany Wind Power 2022 B 3-Month Strip Option	WHS	1W (UDS: 2W)	387
UK Wind Power 2022 Futures	WPU	WX	386
UK Wind Power 2022 Option	OPU	1W (UDS: 2W)	387
UK Wind Power 2022 3-Month Strip Option	WUS	1W (UDS: 2W)	387
Australia VIC 2024-06 Wind Power Futures	WPV	WX	386
Australia VIC 2024-06 Wind Power Option	OWV	1W (UDS: 2W)	387
Australia VIC 2024-06 Wind Power 3-Month Strip Option	WVS	1W (UDS: 2W)	387

These futures and options are currently available for customer testing in New Release.

These contracts are listed with, and subject to, the rules and regulations of NYMEX.

Compute Futures - October 4

Effective Sunday, October 4 (trade date Monday, October 5), pending completion of all regulatory review periods, Compute futures will be listed for trading on CME Globex and for submission for clearing via CME ClearPort.

Compute Futures
PRODUCT	MDP 3.0: TAG 6937-ASSET	iLink/MDP 3.0 Tag 1151 - Security Group	Included Spreads and Combos - Tag 762-SecuritySubType	MARKET DATA CHANNEL MDP 3.0 TAG 1180 - APPLID
Silicon Data H100 Rental Index Futures	GPU1	1(one)C	SA - Average Price Strip SP - Standard Calendar Spread SB - Balanced Strip	386
Silicon Data B200 Rental Index Futures	GPU2		SA - Average Price Strip SP - Standard Calendar Spread RI - Reduced Tick Inter-Commodity Spread

These futures are currently available for customer testing in New Release.

These contracts are listed with, and subject to, the rules and regulations of NYMEX.

Product Changes

NewDelisting and Removal of S&P 500 Growth and S&P 500 Value Futures - This Week

On Monday, September 14, the following S&P 500 Growth and S&P 500 Value futures were delisted. Effective close of business this Friday, September 18, these futures will be removed from CME Globex.

Delisting and Removal of S&P 500 Value & S&P 500 Growth Futures
Product	MDP 3.0: tag 6937-Asset	iLink/MDP 3.0 Tag 1151 - Security Group
S&P 500 Growth Futures	SG	SG
S&P 500 Growth BTIC Futures	SGT	PM
S&P 500 Value Futures	SU	SUT
S&P 500 Value BTIC Futures	SUT	PV

These futures currently have no open interest.

Amendment to Hard Red Spring Wheat Futures and Options Listing - This Week

Effective this Monday, September 14, (trade date this Tuesday, September 15), the listing of Hard Red Spring Wheat was amended on CME Globex as follows:

Amendment to the Hard Red Spring Wheat Futures and Options Listing
Product	MDP 3.0: tag 6937-Asset	iLink/MDP 3.0 tag 1151 - Security Group	Current Listing	Delayed Listing
Hard Red Spring Wheat Futures	HRS	WH	2 Sep and all preceding Mar, May, Jul, and Dec contracts	Dec 2027 and Mar, May, Jul, and Sep 2028
Options on Hard Red Spring Wheat Futures	HSO	W2	Sep, Oct, Nov, Dec 2026 and Mar, May, Jul, and Sep 2027	Dec 2027

These contracts are listed with, and subject to, the rules and regulations of CBOT.

Listing Cycle Expansion for Micro WTI Crude Oil Weekly Options - This Week

Effective this Sunday, September 20 (trade date Monday, September 21), the listing cycle for the following Micro WTI Crude Oil Weekly options will be expanded on CME Globex and for submission for clearing via CME Clearport.

Listing Cycle Expansion for Micro WTI Crude Oil Weekly Options
PRODUCT	MDP 3.0: TAG 6937-ASSET	iLink/MDP 3.0 Tag 1151 - Security Group	Current Listing Schedule	New Listing Schedule
Micro WTI Crude Oil Weekly Options	MW1-MW5	M8	Weekly contracts listed for 2 consecutive weeks.	Weekly contracts listed for 4 weeks. No weekly contract listed if expiration would occur on a holiday.

These options are currently available for customer testing in New Release.

These contracts are listed with, and subject to, the rules and regulations of NYMEX.

Resting Order Elimination: Asset Tag Changes for Bitcoin Volatility Futures - September 30

Effective Wednesday, September 30 (trade date Thursday, October 1), the asset tag will be changed for Bitcoin Volatility futures.

Please Note: To facilitate the change, customers are asked to cancel all Good Till Cancel (GTC) and Good Till Date (GTD) orders after the close on Wednesday, September 30. After 16:00 CT on Wednesday, September 30, all remaining GT orders for this future will be cancelled or deleted by the CME Global Command Center (GCC).

Asset Tag Changes for Bitcoin Volatility Futures
Product	Current MDP 3.0: tag 6937-Asset	New MDP 3.0: tag 6937-Asset	iLink/MDP 3.0 tag 1151 - Security Group
Bitcoin Volatility Futures	BVI	BTCV	CV

These futures are currently available for customer testing in New Release.

These contracts are listed with, and subject to, the rules and regulations of CME.

Changes to Micro WTI Crude Oil Weekly Option - October 4

Effective Sunday, October 4 (trade date Monday, October 5), the listing cycle, product name, and strike price listing schedule for the Micro WTI Crude Oil Weekly option will be updated on CME Globex and for submission for clearing via CME ClearPort.

Changes to Micro WTI Crude Oil Weekly Option
Current Product Name	New Product Name	MDP 3.0: TAG 6937-ASSET	iLink/MDP 3.0 Tag 1151 - Security Group	Current Listing Schedule	New Listing Schedule	Current Strike Price Listing	New Strike Price Listing
Micro WTI Crude Oil Weekly Option	Micro Crude Oil Friday Weekly Option	MW1-MW5	M8	Weekly contracts listed for 2 consecutive weeks.	Weekly contracts listed for 4 weeks. No weekly contract listed if expiration would occur on a holiday.	Minimum 20 strikes above and below the at-the-money strike at $0.25 per barrel increment then 10 strikes above and below the highest and lowest $0.25 per barrel increment strikes at $0.50 per barrel increment on the nearest 0.50 interval then 10 strikes above and below the highest and lowest $0.50 per barrel increment strikes at $2.50 per barrel increment on the nearest 2.50 interval and plus dynamic strikes at $0.25 per barrel increment.	Minimum 20 strikes above and below the at-the-money strike at $0.25 per barrel increment then 10 strikes above and below the highest and lowest $0.25 per barrel increment strikes at $0.50 per barrel then 10 strikes above and below the highest and lowest $0.50 per barrel increment strikes at $2.50 per barrel increment then 20 strikes above the highest $2.50 per barrel increment strikes at $5.00 per barrel increment plus dynamic strikes at $0.25 per barrel increment.

These changes are currently available for customer testing in New Release.

These contracts are listed with, and subject to, the rules and regulations of NYMEX.

Post-Trade

Unit of Measure Update to Support Wind Power Futures and Options - October 4

Effective Sunday, October 4 (trade date Monday, October 5), the following new value will be added to the Unit of Measure fields in CME STP FIXML and FIX, to support the launch of Wind Power futures and options.

Unit of Measure Update
FIX tag-Name	FIXML Abbr	Enumerations
996-UnitOfMeasure	TrdCaptRpt/Instrmt/@UOM	GWh-IPNT (Gigawatt hour Index Point)
999-LegUnitOfMeasure	TrdCaptRpt/TrdLeg/Leg/@UOM
1191-PriceUnitOfMeasure	TrdCaptRpt/Instrmt/@PxUOM
2644-CommissionUnitOfMeasure	TrdCaptRpt/RptSide/CommData/@UOM
41309-StreamNotionalUnitOfMeasure	TrdCaptRpt/Instrmt/Strm/@NotlUOM
41311-StreamTotalNotionalUnitOfMeasure	TrdCaptRpt/Instrmt/Strm/@TotNotlUOM
42022-UnderlyingStreamNotionalUnitOfMeasure	TrdCaptRpt/Undly/Strm/@NotlUOM
42024-UnderlyingStreamTotalNotionalUnitOfMeasure	TrdCaptRpt/Undly/Strm/@TotNotlUOM

The CME STP FIX Data dictionary has been updated to support this additional enumerated value.

This change is currently available for customer testing in New Release.

Unit of Measure Update to Support Compute Futures - October 4

Effective Sunday, October 4 (trade date Monday, October 5), the following new value will be added to the Unit of Measure fields in CME STP FIXML and FIX, to support the launch of Compute futures.

Unit of Measure update to support Compute Futures
FIX tag-Name	FIXML Abbr	Enumerations
996-UnitOfMeasure	TrdCaptRpt/Instrmt/@UOM	GPU-H (GPU Hours)
999-LegUnitOfMeasure	TrdCaptRpt/TrdLeg/Leg/@UOM
1191-PriceUnitOfMeasure	TrdCaptRpt/Instrmt/@PxUOM
2644-CommissionUnitOfMeasure	TrdCaptRpt/RptSide/CommData/@UOM
41309-StreamNotionalUnitOfMeasure	TrdCaptRpt/Instrmt/Strm/@NotlUOM
41311-StreamTotalNotionalUnitOfMeasure	TrdCaptRpt/Instrmt/Strm/@TotNotlUOM
42022-UnderlyingStreamNotionalUnitOfMeasure	TrdCaptRpt/Undly/Strm/@NotlUOM
42024-UnderlyingStreamTotalNotionalUnitOfMeasure	TrdCaptRpt/Undly/Strm/@TotNotlUOM

The CME STP FIX Data dictionary has been updated to support this additional Enumerated value.

This change is currently available for customer testing in New Release.

Events and Announcements

Registration Open for CME Globex Disaster Recovery Testing for the FIA Industry Exercise - October 24

All trading firms are invited to register and test with CME Group during the annual FIA industry exercise from 9 a.m. to noon Eastern Time Saturday, October 24. During the exercise, CME Group will failover to our Disaster Recovery CME Globex markets and participating firms must connect from outside of CME Aurora.

Additional information is available in the Test Script. Only one registration per firm is required for those that intend to test.

Contact your Global Account Manager or opres@cmegroup.com with any questions.

NewCME Group and Google Market App Building Workshop in London - November 11

On Wednesday, November 11, join CME Group and Google in London for “CME x Google: The Builders Lab,” an exclusive in-person interactive coding workshop designed exclusively for developers and quants to harness our premium futures and options data to build a real-world analytics application of your choice.

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