ICE Main2 migration requires Trading Technologies users to cancel outstanding GT orders by 4 December

Trading Technologies has warned clients using its execution infrastructure that selected ICE interest-rate and Japanese power products are scheduled to move to ICE's Main2 environment after the trading session on 4 December 2026. In its 30 October system-administration update, TT identifies the required session and risk-configuration work and says working good-till-cancelled and good-till-date orders in the affected instruments will not move automatically. The message is an advance operational warning; the migration has not happened as of 31 October.[1]

The venue mapping is not identical for every product. Affected interest-rate instruments currently available through the ICE_L market in TT will be presented under ICE after cutover. Affected Japanese power products remain under ICE on TT, even though their underlying silo is also migrating. Clients cannot infer a universal new destination or symbol from the Main2 label alone. The contract list and exchange notices govern which instruments a specific trading account must remap.[1]

TT asks users to obtain Main2 order-entry sessions and coordinate dedicated connection configuration. For instruments moving away from ICE_L, users must also set up relevant ICE market access and reconfigure product limits and risk settings. A permission that works for one existing trading destination does not automatically grant access to the replacement session. These steps affect brokers, clearing relationships and vendor-managed trading infrastructure alike.[1]

Main2 cutover requirements

The outstanding-order treatment is the most immediate operational hazard. TT says customers must cancel remaining orders in affected instruments by the end of the 4 December session, including GTC and GTDate instructions, because orders will not migrate. ICE will cancel residual GT orders under its planned process. A firm that relies on an assumed migration of resting orders could discover its intended exposure is no longer working after the weekend; conversely, duplicating replacement orders without reconciling cancellations could create unintended exposure.[1]

TT expects ordinary trading hours to remain unchanged during the December migration. ICE is separately targeting 24 January 2027 to extend trading hours for the relevant Main2 products. That later objective is not part of the December cutover and should not be presented as a live schedule extension. The vendor says no additional TT client configuration is expected for the later hours phase, but venue hours and client risk policies still need separate review.[1]

Trading Technologies' notice sets the cancellation deadline at the end of the 4 December 2026 session for affected migrating ICE products, including outstanding GTC and GTDate orders. It also calls for dedicated Main2 order-entry sessions and appropriate product-limit remapping. A user who only updates market-data symbols may still leave working orders exposed to cancellation or misrouted risk limits. Separately, ICE targets 24 January 2027 for extended hours on those Main2 products; the December order migration does not itself change the trading hours.[2]

For execution operations, the right control is a per-instrument transition checklist linked to venue permissions, session identifiers, order cancellation, risk-limit mapping and post-cutover acknowledgments. The 30 October bulletin documents a specific required migration rather than a generic systems upgrade. Its impact will depend on the contracts and order states each broker actually carries when the December session closes.[1]

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