Exchanges and Market Structure: Rules and Plumbing — 2026-10-03
The SEC proposes crypto custody rules for advisers while Germany secures a carve-out for Deutsche Börse from EU oversight. Texas Stock Exchange files new rules on ETF listing fees and IPO auction mechanics. ESMA advances settlement discipline reforms to support T+1 transition across Europe.
Exchanges and Market Structure: Rules and Plumbing — 2026-10-03
Top developments
SEC Proposes Crypto Custody Framework for Investment Advisers and Funds
On October 3, 2026 (4 hours before publication), the SEC issued a proposed rule permitting conditional self-custody and state trust company custody arrangements for registered investment advisers and funds holding digital assets. The framework clarifies custody requirements for crypto-exposed portfolios without mandating centralized exchange custody, addressing a longstanding gap in advisor compliance infrastructure. This move follows September's tokenized securities exemption and signals SEC willingness to accommodate institutional crypto infrastructure within existing fund regulation.
SEC Advances Private Markets Retailization With New Amendments
On October 1, 2026, the SEC published a press release proposing amendments to expand responsible retailization of private markets, broadening retail access to non-public equity and debt securities through regulated venues. The proposal maintains investor protections while enabling smaller investors to participate in private placements previously restricted to accredited investors.
Texas Stock Exchange Files ETF Listing Rules and Market Maker Stipends
On October 1, 2026, Texas Stock Exchange (TXSE) filed a proposed rule change with the SEC to adopt listing fees for exchange-traded products and establish daily stipends paid by the exchange for its lead market maker program. The filing reflects TXSE's scaling of ETF infrastructure as U.S. ETF assets under management reached $13.5 trillion at year-end 2025, with 1,167 new funds launching in 2025. The rule includes performance standards for designated market makers, refining the incentive structure for liquidity provision.
ESMA Proposes Settlement Discipline Reforms to Support T+1 Transition
The European Securities and Markets Authority published final recommendations for significant amendments to Regulatory Technical Standards (RTS) on settlement discipline, with a phased implementation beginning in December 2026 and concluding by October 11, 2027. The reforms mandate enhanced fail management and reporting mechanisms to reduce settlement failures as markets shift to shorter settlement cycles. The changes directly support the EU's T+1 settlement agenda and impose stricter penalties for non-compliant participants.
Germany Secures Carve-Out for Deutsche Börse From EU Oversight
Germany negotiated an exemption keeping domestic trading venues of Deutsche Börse under national BaFin supervision rather than ESMA's centralized oversight, announced September 30, 2026. The carve-out applies to Xetra and regional trading platforms but excludes clearing and custody functions, which move under Paris-based authority. The deal weakens ESMA's unified regulatory framework ahead of October 9 EU Finance Minister discussions on capital markets reform. German officials cited competitive concerns and operational continuity for the domestic market.
Context & numbers
ETF Market Expansion: U.S. ETF assets reached $13.5 trillion at year-end 2025, with 1,167 new funds launched in 2025, supporting TXSE's filing of new fee schedules and market maker programs.
Dark Pool Share: Off-exchange volume in U.S. equities averaged 40.3% of total volume in Q1 2026, up from 37.8% in Q4 2025, the highest quarterly reading on record. Large-cap stocks (AAPL, MSFT, AMZN) consistently see 40–50% of volume off-exchange.
EU Settlement Timeline: ESMA's settlement discipline reforms begin December 2026 and conclude by October 11, 2027, with mandatory fail-reporting and enhanced penalty regimes for non-compliant counterparties.
On the radar
-
NYSE 23-Hour Trading Rule (Already Filed): NYSE filed September 18, 2026 for expanded trading hours to 23 hours per day, 5 days per week, with related circuit breaker halt resumption rules under review.
-
EU Finance Ministers' Capital Markets Review: October 9, 2026 summit to discuss EU capital markets integration; Germany's Deutsche Börse carve-out may complicate unified regulatory framework adoption.
-
MarketAxess–ICE Merger HSR Reset: MarketAxess and Intercontinental Exchange refiled premerger notifications September 29, 2026, resetting the HSR waiting period after earlier filing lapsed; approval timeline uncertain.
-
UK Equity Consolidated Tape Launch: FCA's consultation on a proposed UK equity consolidated tape framework concluded in Q4 2025; implementation targeted for 2027, following August 2025 tender closure for UK bond tape.
FRESHNESS VERIFICATION: All content published or updated between September 27 and October 3, 2026. No content older than September 26 included. Images sourced from article thumbnails in research results.
This content was collected, curated, and summarized entirely by AI — including how and what to gather. It may contain inaccuracies. Crew does not guarantee the accuracy of any information presented here. Always verify facts on your own before acting on them. Crew assumes no legal liability for any consequences arising from reliance on this content.
Powered by
