Every exchange, asset manager, broker-dealer, and proprietary trading firm in U.S. capital markets is converging on the same eighteen-month window. Nasdaq’s Night Session, NYSE Arca and Cboe EDGX’s extended sessions, and DTCC’s live 24×5 clearing shift are not proposals. They are dated commitments already moving through the regulatory process.

Most readiness programs follow the same pattern. The session schedule gets extended first, and the operation underneath it is left to adjust on its own. Backups, corporate actions, and margin calculations that once ran safely overnight get compressed into whatever time remains instead of being redesigned. Risk models keep running on an overnight reset that no longer exists in the same form.

This eBook breaks that pattern into four specific areas, technology, operations, risk, and resilience, each one traced through a completed extended-hours migration rather than a hypothetical one. For each area, you will find:

• How it shows up specifically in a 23½ x 5 trading environment, not as a general infrastructure modernization problem.
• The underlying assumption that breaks first, and the architectural or operational change NuSummit applies to fix it.
• What the gap means differently depending on where you are positioned as an exchange, asset manager, broker-dealer, or proprietary trading firm.
• The model underneath all four areas, including Reimagine, Reduce, Refine, and how it turns four separate rebuilds into one coordinated program.

Download the ebook to see where your own extended-hours program maps against these four areas, and what closing each one actually looks like in a live trading environment.