The forward FMI implementation calendar.

By 9 October 2026, NSCC members are encouraged to complete regression testing and confirm data continuity for existing CNS machine-readable output reports and the MT570 Intraday Position Change message, where applicable. If DTCC receives no attestation or issue notification, it will treat the firm as having completed testing with no outstanding readiness issue.

Clearstream Banking Frankfurt plans to deploy the November 2026 T2S release scope into pre-production on 9 October following the Market Infrastructure Board go/no-go decision on 29 September.

EU finance ministers are scheduled to seek a general approach on the market integration and supervision package, including the proposed scope of direct ESMA supervision over significant cross-border market entities.

Cboe will run its second 2026 business-continuity pre-test across BYX, BZX, EDGA, EDGX, Cboe Options, C2 Options and CFE. Systems will start at the Secaucus primary site and fail over to the Chicago secondary site, with all symbols available for order entry.

CME Clearing members must run deployable margin software version 3.2.6 or later by 12 October 2026. Support for earlier versions will end after the production cutover. Version 3.2.11 is available as an optional incremental patch, but any supported build from 3.2.6 upward satisfies the minimum-version requirement.

The CFTC Division of Market Oversight’s temporary no-action position for designated contract markets converting existing perpetual-style broad-based security-index futures into true perpetual futures expires. DCMs relying on the relief must have completed the required customer feedback, advance notice, exit opportunity, risk disclosures and Rule 40.5 or 40.6 filing steps.

Comments close on FICC filing SR-FICC-2026-010, which took immediate effect and updates the shared DTC, FICC and NSCC Clearing Agency Risk Management Framework. The revisions add disclosures on core-service-provider risk, stakeholder councils, recovery and wind-down planning, governance and conflict-of-interest controls, alongside structural and administrative updates.

Eurex Clearing and Clearstream carry out the Project UNO migration for GC Pooling and GC Pooling Re-Use collateral on 24 October 2026. Open exposures settling through 6-series accounts are scheduled to move to Clearstream Banking Luxembourg settlement accounts, including collateral reused for Eurex margining.

Eurex Clearing’s rescheduled C7 SCS Release 6.0 member focus weeks begin on 26 October and run through 6 November 2026. The window covers non-German ISIN settlement via CEU-T2S accounts and Scandinavian currencies for GC Pooling.

Eurex is scheduled to begin trading and centrally clearing Japanese single-stock futures and single-stock dividend futures. The first phase covers 10 Nikkei 225 companies, with single-stock futures in yen and US dollars and dividend futures in yen.

Nasdaq anticipates beginning its 23-hours-per-day, five-days-per-week trading schedule on or about 6 December 2026, adding a 9:00 p.m.–4:00 a.m. ET Night Session.