Best Case
15%The SEC uses the review to simplify governance, lower costs, and improve privacy protections without impairing surveillance.
Forecast dossier
The SEC is likely to use the CAT concept release to push a broader market-data and cost review
The SEC's April 2026 concept release on the Consolidated Audit Trail signals a durable re-examination of market-data infrastructure, with likely pressure for lower-cost, more privacy-aware, and possibly structurally simpler audit-trail rules.
Verdict: Likely start of a longer reform cycle, not an immediate overhaul.
Date
Apr 26, 2026
Reliability
79
Harm potential
Medium
Scenario odds
Baseline
50%The review produces incremental CAT trimming and cost-pressure proposals over the next 12 to 24 months.
Adverse Case
25%The review stalls in comment collection and only modest technical adjustments follow.
Wildcard
10%A legal, political, or cybersecurity event accelerates a much broader redesign of market audit infrastructure.
Timeline projections
1-Year
Comment period and follow-on analysis
Developments: The SEC will likely sort comments into themes around cost, privacy, and surveillance utility.
Risks: Consensus may be hard to reach.
Outlook: A reform agenda is more likely than a quick rule change.
2-Year
Targeted amendments or pilot ideas
Developments: The SEC may propose narrower changes to governance or data-use rules.
Risks: Industry pushback could slow action.
Outlook: Expect measured reform rather than abolition.
3-Year
Infrastructure repricing
Developments: Brokerages and exchanges may start planning around a more cost-sensitive audit-trail regime.
Risks: Noisy litigation or inter-SRO disputes.
Outlook: CAT becomes a live structural issue, not a settled fixture.
5-Year
Possible structural simplification
Developments: The SEC could settle on a simpler audit-trail architecture or data-access model.
Risks: Security and market-surveillance tradeoffs.
Outlook: A redesign is plausible if the review keeps momentum.
10-Year
Market-data governance reset
Developments: Audit-trail rules may be more modular, cheaper, and more privacy-conscious.
Risks: Technology shifts may outpace regulation.
Outlook: The review could reshape how U.S. market surveillance is funded and governed.
20-Year
Legacy infrastructure phaseout risk
Developments: Older centralized reporting layers may be replaced by more distributed data architectures.
Risks: Fragmentation if standards diverge.
Outlook: The CAT review may be remembered as the beginning of a structural transition.
50-Year
Foundational surveillance redesign
Developments: Future regulators may view 2026 as a turning point in how market data is collected and priced.
Risks: History is contingent on later reforms.
Outlook: Its long-run significance depends on whether the SEC keeps pushing beyond consultation.
Planning prompts to verify
- Monitor the comment docket for themes on governance, costs, and privacy.
- Watch for follow-on SEC or SRO proposals that turn the concept release into amendments.
- Track whether market participants start modeling CAT cost reductions or scope cuts in budgets.