All posts

Market Insights9 min read

CME to launch 24/7 trading for 100‑Ounce Silver on Sept 11

CME sets Sept 11, 2026 start for 24/7 trading in 100‑Ounce Silver futures; see sessions, weekend access, risk controls, and how to verify go‑live vs cutovers.

By TerraTrade Team

Minimalist silver bars with a 24/7 ribbon motif crossing a weekly calendar grid, no logos

What’s scheduled to change and when#

Published: September 5, 2026

CME Group has scheduled its 100‑Ounce Silver futures to move to 24/7 trading, with the first production weekend session planned for Friday, September 11, 2026 at 4:30 p.m. Central Time. The August 11 announcement stated the change was pending regulatory review; subsequent Globex notices detail the technical cutovers and reconfirm the September 11 start for weekend trading CME Group to Expand 24/7 Trading to 100-Ounce Silver Futures After Gold's Strong Debut - CME GroupCME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group.

MilestoneWhat it means for tradersEffective date/time (CT)Where to verify
CME announcementCompany schedules 24/7 trading for 100‑Ounce Silver futures; noted as pending regulatory reviewAnnounced Aug 11, 2026CME press release CME Group to Expand 24/7 Trading to 100-Ounce Silver Futures After Gold's Strong Debut - CME Group
Technical migration (MDP/segment)100‑Ounce Silver (referred to as “SIC” in the notice) migrates to MDP 3.0 channel 329; MarketSegmentID 74; new Security Group “4S”; block trades removedEffective Sun Aug 30, 2026 (trade date Mon Aug 31)CME Globex Notice (Aug 24) CME Globex Notice: August 24, 2026 - CME Group
Clearing/product modificationContract amendments tied to 24/7 hours documented for clearingEffective Sep 11, 2026CME Clearing Product Modification (Aug 26) Product Modification Summary: Amendments to the 100-Ounce Silver Futures Contract – 24/7 Trading Hours on CME Globex - Effective September 11, 2026 - CME Group
First production weekend session24/7 weekend trading for 100‑Ounce Silver begins; first‑day maintenance extended to 4:00–4:30 p.m.Opens Fri Sep 11, 2026 at 4:30 p.m.CME Globex Notices (Aug 24, Aug 31) CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group
Weekend trade‑date handlingTrades from Friday evening through Sunday evening process with trade date on the next business dayFrom Sep 11, 2026 onwardCME Globex Notices (Aug 24, Aug 31) CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group
Regulatory filingsPublic record that COMEX filings for the change were submitted and certified in August 2026Certified Aug 25, 2026CFTC industry filings Industry Filings: Product Terms and Conditions Rules - Designated Contract Markets | CFTC

How the new 24/7 session will work#

CME’s notices indicate that 100‑Ounce Silver futures will trade continuously on CME Globex with a weekly maintenance window, and that the first production weekend session will start on Friday, September 11 at 4:30 p.m. CT. On that first day, the routine Friday maintenance is extended to 4:00–4:30 p.m. CT prior to the evening open. CME also notes that trades executed from Friday evening through Sunday evening will be processed with a trade date on the following business day CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group.

Operational and technical cutovers you must prepare for#

CME’s Globex notices call out several concrete, testable changes tied to the rollout. Traders and platform teams should treat these as pre‑requisites for a smooth cutover:

Checklist: verify go‑live vs. technical cutovers#

Use this step‑by‑step to distinguish the technical cutovers from the live 24/7 trading start and to verify you’re aligned with CME’s specs.

  1. Open CME’s latest Globex notices and confirm the silver 24/7 entry: note the migration effective Sunday, Aug 30 (trade date Mon Aug 31) and the production weekend start on Fri Sep 11 at 4:30 p.m. CT CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group.
  2. In your market‑data tools, confirm the instrument appears on MDP 3.0 channel 329 with MarketSegmentID 74 and Security Group “4S.” If you maintain per‑channel firewalls or entitlements, update them accordingly CME Globex Notice: August 24, 2026 - CME Group.
  3. Disable or fence any block‑trade logic and routing in OMS/EMS for 100‑Ounce Silver futures. CME indicates block trades are no longer supported CME Globex Notice: August 24, 2026 - CME Group.
  4. In CME New Release (test), validate instrument discovery and order‑entry behavior (including SecurityGroup and MarketSegment tags) before production. Do not assume production weekend access until the Sep 11 window CME Globex Notice: August 24, 2026 - CME Group.
  5. Plan around the extended Friday maintenance on Sep 11 (4:00–4:30 p.m. CT) and monitor the 4:30 p.m. open for the first weekend session CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group.
  6. Confirm clearing and back‑office rules: weekend executions will be processed with trade date on the following business day; ensure daily P&L, margins, and risk checks reflect that CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group.
  7. Cross‑check the clearing/product modification advisory for the effective date of amended hours (Sep 11) and any settlement‑side notes Product Modification Summary: Amendments to the 100-Ounce Silver Futures Contract – 24/7 Trading Hours on CME Globex - Effective September 11, 2026 - CME Group.
  8. Optionally, confirm that relevant CFTC rule filings show certification status for the silver 24/7 amendments (certified Aug 25, 2026) to understand the regulatory timeline Industry Filings: Product Terms and Conditions Rules - Designated Contract Markets | CFTC.

Risk controls for weekend trading on Globex#

Weekend access changes how credit, sessions, and monitoring should be configured. CME’s client systems guidance highlights several specifics that firms should address before the first weekend session:

How to confirm you’re looking at the live exchange specs#

Before trading, pull the live exchange specifications. The product circular SER‑9649 contains the contract specifications prior to the 24/7 change, while CME’s clearing/product modification advisory records the effective change to 24/7 hours from September 11, 2026. Rely on the latest CME notices and contract bulletins for final parameters, not screenshots or third‑party summaries SER-9649Product Modification Summary: Amendments to the 100-Ounce Silver Futures Contract – 24/7 Trading Hours on CME Globex - Effective September 11, 2026 - CME Group.

Strengths traders can use

  • ✓Broader access to hedge and manage risk during global events and off‑hours.
  • ✓Follows gold’s 24/7 path at CME, improving consistency across precious‑metals access (Source: CME Group to Expand 24/7 Trading to 100-Ounce Silver Futures After Gold's Strong Debut - CME Group).
  • ✓Customer testing in CME’s New Release environment supports pre‑launch validation (Source: CME Globex Notice: August 24, 2026 - CME Group).

Limitations and cautions

  • —Weekend liquidity can be thinner and spreads wider than weekday core hours; plan sizing and slippage contingencies.
  • —Block trades are no longer supported for 100‑Ounce Silver futures; adjust execution playbooks (Source: CME Globex Notice: August 24, 2026 - CME Group).
  • —Weekly maintenance interrupts continuity; ensure algos and risk checks recover cleanly after the window (Source: CME Globex Notice: August 24, 2026 - CME Group) (Source: CME Globex Notice: August 31, 2026 - CME Group).
  • —Weekend executions post with next‑business‑day trade date, adding reconciliation complexity (Source: CME Globex Notice: August 24, 2026 - CME Group) (Source: CME Globex Notice: August 31, 2026 - CME Group).

Operational upsides

  • ✓Clear, dated migration and launch notices allow structured dress‑rehearsals and monitoring checklists (Source: CME Globex Notice: August 24, 2026 - CME Group) (Source: CME Globex Notice: August 31, 2026 - CME Group).
  • ✓CME New Release testing and client impact documentation support connectivity and order‑management validation before go‑live (Source: CME Globex Notice: August 24, 2026 - CME Group) (Source: 100-Ounce Silver Futures Expansion to 24-7 Trading - CME Group Client Systems Wiki - Confluence).
  • ✓First‑day maintenance extension is pre‑announced, enabling planned change windows and staffing (Source: CME Globex Notice: August 24, 2026 - CME Group) (Source: CME Globex Notice: August 31, 2026 - CME Group).

Operational risks to manage

  • —Reconfiguration risk: new MDP channel, segment, and security group require coordinated updates; stale mappings could disrupt data or routing (Source: CME Globex Notice: August 24, 2026 - CME Group).
  • —Weekend entitlement risk: 7‑day sessions and weekend credit limits must be enabled; otherwise orders may be rejected at the transition (Source: 100-Ounce Silver Futures Expansion to 24-7 Trading - CME Group Client Systems Wiki - Confluence).
  • —Execution impact: block trade deprecation necessitates alternative execution methods for size (Source: CME Globex Notice: August 24, 2026 - CME Group).
Stacked silver bars encircled by a subtle 24/7 ribbon overlapping a weekly calendar grid.
Silver’s benchmark futures are slated to join 24/7 trading on CME Globex; verify the September 11 start against CME’s live notices before planning weekend activity [source:2][source:5].
Trading tools

FAQ: what traders asked this week#

What is the exact start time for 24/7 trading in 100‑Ounce Silver futures?

CME’s notices schedule the first production weekend session for 100‑Ounce Silver futures on Friday, September 11, 2026 at 4:30 p.m. Central Time. On that first day, daily maintenance is extended to 4:00–4:30 p.m. CT before the open CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group.

Will silver trade over the weekend before September 11?

No. The August 30 (trade date August 31) activity is a technical migration of channels/segments. CME states that production weekend trading will begin on Friday, September 11 at 4:30 p.m. CT CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group.

Are block trades still available for 100‑Ounce Silver futures after the change?

CME indicates block trades for 100‑Ounce Silver futures will no longer be supported as part of the 24/7 rollout. Remove or adjust any block‑trade workflows CME Globex Notice: August 24, 2026 - CME Group.

How are weekend executions dated for clearing and back‑office?

CME’s notices specify that trades executed from Friday evening through Sunday evening will be processed with a trade date on the next business day. Plan P&L and margin processes accordingly CME Globex Notice: August 24, 2026 - CME GroupCME Globex Notice: August 31, 2026 - CME Group.

How do I confirm regulatory sign‑off for the 24/7 change?

The Aug 11 press release announced the plan “pending regulatory review.” Public CFTC filings show certification for related COMEX amendments on Aug 25, 2026, and CME’s clearing/product modification notice records the effective trading‑hours change on Sep 11, 2026 CME Group to Expand 24/7 Trading to 100-Ounce Silver Futures After Gold's Strong Debut - CME GroupIndustry Filings: Product Terms and Conditions Rules - Designated Contract Markets | CFTCProduct Modification Summary: Amendments to the 100-Ounce Silver Futures Contract – 24/7 Trading Hours on CME Globex - Effective September 11, 2026 - CME Group.

Which market‑data channel and segment will carry 100‑Ounce Silver after migration?

After the Aug 30/31 migration, the product is carried on MDP 3.0 channel 329 with MarketSegmentID 74 and Security Group “4S.” Verify these identifiers in your market‑data subscriptions CME Globex Notice: August 24, 2026 - CME Group.

Sources#

Market InsightsFuturesRisk Management

KEEP READING

Wall calendar overlaid on an equity index futures price chart

Futures8 min read

Futures expiry and rollover without the jargon

Plain-English guide to futures rollover: contract months, how liquidity migrates, how final settlement works, and a neutral pre-roll checklist.

Read post
Candlestick Nasdaq-100 futures chart over the Chicago skyline at dusk

Futures8 min read

NQ vs MNQ: sizing Nasdaq futures responsibly

See NQ vs MNQ contract size side by side, with CME multipliers, tick values, calendar-spread increments, and neutral sizing examples you can verify.

Read post
Street-level view of the Chicago Mercantile Exchange building at dusk with people walking by

Futures5 min read

CME futures contracts: the specs a trader must verify

A practical primer on CME futures contract specifications: tick size, tick value, multipliers, sessions, and expiry—plus a 5‑minute verification checklist.

Read post

Your journal writes posts like this about you.

Connect a broker and TerraTrade turns your own trades into the findings that matter.

Get startedExplore the product