The useful answer: the SEC's small entity compliance guide describes a market-wide move from a three-business-day (T+3) to a two-business-day (T+2) standard settlement cycle for most broker-dealer transactions, announced in a March 22, 2017 amendment to Exchange Act Rule 15c6-1(a). The compliance date set in the guide was September 5, 2017.
This article is a reading aid, not legal advice and not a substitute for the rule itself. The guide itself says it summarizes and explains rules but is not a substitute for any rule.
What changed, and what did not
The amendment shortened the standard settlement cycle for most broker-dealer transactions from three business days after the trade date (T+3) to two business days after the trade date (T+2). Subject to the exceptions listed in the rule, the prohibition in paragraph (a) of Rule 15c6-1 applies to all securities.
The exceptions matter for anyone writing about settlement. Rule 15c6-1(a) does not apply to a contract for an exempted security, government security, municipal security, commercial paper, bankers' acceptances, or commercial bills. The guide also points to a firm-commitment offering carve-out tied to sales by an issuer to an underwriter or to an initial purchaser by a participating broker-dealer.
Deadlines that move with the cycle
The guide frames T+2 as a knock-on change, not just a single number. Shortening the standard cycle could affect how market participants comply with existing regulatory obligations related to the settlement cycle. The table below sets out the before-and-after figures as the guide states them.
| Obligation | Before | After |
|---|---|---|
| Standard settlement cycle, Rule 15c6-1(a) | T+3 | T+2 |
| Reg SHO Rule 204 close-out, fails from short sales | T+4 | T+3 |
| Reg SHO Rule 204 close-out, long sales or bona fide market making | T+6 | T+5 |
| Rule 15c3-3(m) possession period before close-out | 13 business days | 12 business days |
The guide also notes that the shorter cycle effectively shortens the timeframe within which broker-dealers must comply with Exchange Act Rule 10b-10, which requires giving or sending a written confirmation at or before completion of the transaction.
A worked example for editors
Consider how to express a single transaction without conflating the trade date, the settlement date and a close-out deadline. The example below is Hypothetical and uses only the intervals the guide states.
- Hypothetical trade date: a Monday. Under T+2, settlement falls two business days later, on the Wednesday.
- Hypothetical short-sale fail: the close-out window under Rule 204 would be T+3, three business days after the trade date, rather than the earlier T+4.
- Hypothetical long-sale fail: the close-out window would be T+5, five business days after the trade date, rather than the earlier T+6.
In copy, keep each interval attached to its own rule. A sentence that says "settlement moved to two days" and then applies that number to a Reg SHO close-out describes two different deadlines as one.
Operational checklist for small entities
The guide does not prescribe a project plan, but it does list the areas it says small entities may need to address. A checklist drawn directly from those statements is a safer structure than a narrative of assumed firm behavior.
- Business practices: review changes needed to operate in a T+2 environment.
- Computer systems and technology: account for system changes and possible new technology solutions.
- Testing: plan to test changes to systems, operations, policies and procedures.
- Customer education: retail-facing firms may need to explain the shorter cycle to customers.
- Related obligations: check settlement-linked rules, including Reg SHO Rule 204, Rule 10b-10 and Rule 15c3-3(m).
The guide states that certain broker-dealers, including small entities, may need to make operational changes and incur costs to operate in a T+2 environment. It does not quantify those costs.
Announcement, compliance date and status
Three dates do different work here and should not be merged in a summary. The March 22, 2017 date is when the Commission amended Rule 15c6-1(a). September 5, 2017 is the compliance date the Commission established for industry implementation. From that date, the guide states, the standard cycle for covered transactions is two business days following the transaction date, subject to the rule's exceptions.
The guide also identifies its own status: it was prepared by SEC staff as a small entity compliance guide under Section 212 of the Small Business Regulatory Enforcement Fairness Act of 1996, as amended. That is a description of the document's purpose, not a restatement of the rule's text.
What the source does not say
Several things a reader might expect are not established by this source. Do not fill them in from memory or from other coverage.
- No per-firm cost figures, cost ranges or industry-wide cost totals appear in the guide.
- No list of affected securities beyond the stated exceptions and the general scope of Rule 15c6-1(a) is given.
- No enforcement approach, penalty schedule or waiver process is described.
- No comparison with later or earlier settlement-cycle amendments is provided.
- No statement is made about the volume or dollar value of affected trades.
For a template-friendly summary, keep the distinctions visible: quote the interval, name the rule, state the date, and mark any example as Hypothetical. That habit keeps a compliance guide from reading like a forecast.