SEC Rule 204

The April 2024 amendment to Rule 204 — adjusting the close-out deadlines to reflect the transition from T+2 to T+1 standard settlement — is the most recent change to the rule's operative framework and reflects the broader structural shift in U.S. equity market settlement mechanics that became effective May 28, 2024.

Overview and Regulatory Purpose

The fail-to-deliver problem that Rule 204 addresses has its roots in the fundamental mechanics of securities settlement. When a broker-dealer sells securities on behalf of a customer or for its own account and fails to deliver those securities to the buyer's broker by the settlement date, the resulting fail-to-deliver position represents an outstanding obligation — an unsettled trade in which the seller has received payment but the buyer has not received the securities purchased. For individual transactions, a fail-to-deliver is an operational inconvenience. For patterns of persistent fails in specific securities, the aggregated effect is more serious: persistent fail-to-deliver positions in a security artificially increase the apparent supply of that security by creating the economic equivalent of additional shares that have been sold but not delivered, potentially depressing prices below their genuine equilibrium level.

The harm from persistent fails-to-deliver falls disproportionately on buyers who have paid for securities they are not receiving, on issuers whose securities are subject to artificial apparent-supply inflation, and on the integrity of the settlement system itself. Rule 204 addresses this harm by imposing a mandatory and time-limited obligation to close out fail-to-deliver positions — through actual purchasing or borrowing of the securities — within a prescribed period after the settlement failure arises. The rule's design reflects the Commission's determination that fails-to-deliver are not purely operational matters to be resolved at the convenience of the failing party but are regulatory violations with specific statutory cure obligations and consequences for non-compliance.

Statutory Authority and Rulemaking History

Rule 204 derives its statutory authority from Sections 10(a), 10(b), 15(c)(3), and 23(a) of the Securities Exchange Act of 1934. Section 10(a) provides the Commission's authority to regulate short sales; Section 15(c)(3) authorises rules governing broker-dealer financial responsibility and settlement practices; and Sections 10(b) and 23(a) provide the broader anti-manipulation and general rulemaking authorities underlying Regulation SHO as a whole.

The Commission initially adopted temporary Rule 204T in October 2008 — Securities Exchange Act Release No. 34-58775, 73 FR 61706 — as an emergency measure to address the extreme settlement failure levels during the financial crisis, when total aggregate fail-to-deliver positions reached $20.3 billion on a single day in September 2008. Final Rule 204 was adopted July 27, 2009 — Securities Exchange Act Release No. 34-60388, 74 FR 38292 — making permanent the close-out requirement framework established by temporary Rule 204T and eliminating the prior grandfather provision and options market maker exception that had allowed certain categories of fail-to-deliver position to persist indefinitely under the pre-Rule 204T framework.

Rule 204 has been amended three times since its 2009 adoption: on November 19, 2018 — 83 FR 58427 — in connection with settlement cycle and securities delivery rule updates; on April 9, 2021 — 86 FR 18809 — in connection with technical updates; and most recently on April 15, 2024 — 89 FR 26608 — in connection with the T+1 settlement cycle transition rulemaking, which adjusted Rule 204's close-out deadline references to reflect the shortened settlement cycle that took effect May 28, 2024. The transition from T+2 to T+1 standard settlement — adopted in Securities Exchange Act Release No. 34-96930, February 15, 2023, effective May 28, 2024 — materially compressed the Rule 204 close-out timelines by reducing the number of settlement days between trade date and the close-out deadline.

Key Provisions and Operative Requirements

Rule 204(a) establishes the primary delivery and close-out obligation. A participant of a registered clearing agency must deliver securities to a registered clearing agency for clearance and settlement on a long or short sale in any equity security by settlement date. Under T+1 standard settlement, settlement date is T+1 — the business day following the trade date. If a participant has a fail-to-deliver position at a registered clearing agency in any equity security for a long or short sale transaction in that equity security, the participant must, by no later than the beginning of regular trading hours on the settlement day following the settlement date, immediately close out its fail-to-deliver position by borrowing or purchasing securities of like kind and quantity. Under T+1 settlement, the settlement day following settlement date is T+2 — meaning short sale fail-to-deliver positions must be closed out by market open on T+2, the second business day after the trade date. This two-day timeline — from trade execution to mandatory close-out — is among the most compressed settlement failure resolution requirements in any major global equities market.

Two specific carve-outs modify the standard close-out deadline under Rule 204(a). First, where a participant can demonstrate on its books and records that the fail-to-deliver position resulted from a long sale — meaning the selling party held the securities but failed to deliver them on time due to operational reasons rather than a naked short position — the close-out deadline is extended to no later than the beginning of regular trading hours on the third consecutive settlement day following the settlement date. Under T+1 settlement, this means the T+4 deadline applies — market open on the fourth business day after trade date — giving participants additional time to resolve operational delivery failures from long sale positions that do not carry the same naked short selling concerns as short sale-related fails. Second, where a fail-to-deliver position is attributable to bona fide market making activities by a registered market maker, options market maker, or other market maker obligated to quote in the applicable security under the rules of a national securities exchange or national securities association, the same extended T+4 deadline applies, acknowledging that market makers' continuous liquidity provision creates operational delivery pressures that warrant the additional resolution time.

Rule 204(b) establishes the pre-borrow consequence for non-compliance. If a participant fails to close out a fail-to-deliver position in accordance with Rule 204(a)'s requirements, the participant and any broker-dealer from which it receives trades for clearance and settlement — including any market maker that would otherwise be entitled to rely on Rule 203(b)(2)(iii)'s bona fide market making exception to the locate requirement — may not accept a short sale order in the equity security from another person, or effect a short sale in that security for its own account, without first borrowing the security or entering into a bona fide arrangement to borrow the security. This pre-borrow obligation continues until the participant closes out the fail-to-deliver position by purchasing securities of like kind and quantity and that purchase has cleared and settled at a registered clearing agency.

The Rule 204(b) pre-borrow consequence is one of the most commercially significant provisions in the rule's framework. By eliminating the locate option — which permits effecting a short sale on the basis of reasonable grounds to believe the security can be borrowed — and requiring actual pre-borrowing, Rule 204(b) substantially increases the compliance cost of short selling in securities where the participant has an unclosed fail-to-deliver position. This heightened cost creates a powerful incentive for participants to close out fails promptly upon their identification, since the alternative — allowing the fail to persist and triggering the pre-borrow requirement — impairs the participant's ability to serve customer short sale orders and conduct proprietary trading in the affected security.

Rule 204(d) addresses the allocation of fail-to-deliver positions. If a participant reasonably allocates a portion of a fail-to-deliver position at a registered clearing agency to another registered broker-dealer — based on that broker-dealer's short position in the security — the close-out obligation for that allocated portion applies to the broker-dealer that received the allocation rather than to the participant. This allocation mechanism allows clearing participants to apportion the close-out responsibility to the broker-dealers whose short selling activity generated the underlying fail, creating a direct accountability linkage between the broker-dealer responsible for the short position and the obligation to close out the resulting settlement failure.

Rule 204(e) provides the pre-fail credit mechanism. A participant or broker-dealer that purchases or borrows securities after the trade date but prior to incurring or being allocated a fail-to-deliver position may use those pre-fail purchases or borrows to offset the close-out obligation, provided the pre-fail activity is for the entire amount of the anticipated fail position. This mechanism allows participants to take proactive steps to address anticipated settlement failures before they materialise as formal fail-to-deliver positions at the clearing agency, providing operational flexibility for managing complex settlement situations without losing the close-out credit for proactive remediation actions.

Rule 204(f) establishes the anti-sham provision. A participant or broker-dealer shall not be deemed to have fulfilled the close-out requirements of Rule 204(a) where it enters into an arrangement with another person to purchase or borrow securities and knows or has reason to know that the other person will not deliver securities in settlement of the purchase or borrow. This provision prevents the use of sham transactions — nominal purchases or borrows that are structured to appear to satisfy the close-out obligation without actually delivering securities — as mechanisms to formally close recorded fail positions while maintaining the economic exposure of the underlying naked short position.

Scope of Application

Rule 204 applies to participants of registered clearing agencies — primarily the broker-dealers and other financial institutions that are direct members of DTCC's National Securities Clearing Corporation, which processes the overwhelming majority of U.S. equity securities transactions. The close-out obligation applies to all equity security fail-to-deliver positions regardless of whether the underlying transaction was a long sale or a short sale, though the applicable deadlines differ: T+2 for short sale fails and T+4 for long sale and bona fide market making fails.

Rule 204's scope encompasses all equity securities — exchange-listed, OTC-traded, and any other category of equity security settling through a registered clearing agency — without limitation based on the security's market capitalisation, trading volume, or threshold security status. This universal scope distinguishes Rule 204 from Rule 203(b)(3)'s threshold security close-out mechanism, which applies only to securities meeting the specific fail-concentration criteria of the threshold security definition.

Relationship to Related Rules and Regulations

Rule 204 is the operational completion of Regulation SHO's anti-naked-short-selling framework. Rule 200 identifies which transactions are short sales; Rule 203's locate requirement prevents naked short selling at the point of order entry; and Rule 204's close-out requirement resolves the settlement failures that occur despite the locate requirement — whether from short sales, long sales, or market making activity. The three rules form a sequential compliance regime: pre-trade classification under Rule 200, pre-trade locate under Rule 203, and post-trade close-out under Rule 204.

The T+1 settlement cycle transition — which shortened the standard settlement period for U.S. equity securities from T+2 to T+1 effective May 28, 2024 — fundamentally altered the practical operation of Rule 204 by compressing the timeframes within which fails must be identified and closed out. Under the prior T+2 settlement regime, a short sale fail-to-deliver position arising on trade date had to be closed out by market open on T+3 — one settlement day after the T+2 settlement date. Under T+1 settlement, the same fail must be closed out by market open on T+2 — one settlement day after the T+1 settlement date. This one-day compression of the close-out timeline has required participants to substantially accelerate their fail identification and remediation processes, with material implications for securities lending operations, clearing system connectivity, and the real-time monitoring capabilities required to identify and address emerging fails before the close-out deadline.

Rule 10b-21 — the naked short selling anti-fraud rule adopted simultaneously with final Rule 204 in 2009 — operates alongside Rule 204 by making it a violation of the Exchange Act's antifraud provisions for a person to deceive a broker-dealer about the source of securities intended for delivery in connection with a short sale, where that deception results in a fail-to-deliver. Rule 10b-21 addresses the specific fraud category of falsely representing locate sources or ownership status to avoid Regulation SHO compliance — a form of deception that Rule 204's close-out obligation would otherwise remediate through the purchase mechanism but that warrants independent antifraud treatment.

Amendment History and Regulatory Evolution

Rule 204's most significant post-adoption development was the April 15, 2024 amendment adjusting its close-out deadline references for T+1 settlement. The transition from T+2 to T+1 standard settlement — the most significant change to U.S. equity market settlement mechanics in decades — required corresponding updates to all settlement-cycle-dependent rules, including Rule 204. The 2024 amendment confirmed that Rule 204's close-out obligations apply on the adjusted T+1 settlement basis without altering any of the rule's substantive framework, conditions, or consequences for non-compliance.

The broader regulatory landscape surrounding Rule 204 continues to evolve through rulemaking and market structure initiatives. A March 12, 2025 petition for rulemaking submitted to the Commission requested amendments to Regulation SHO — including Rule 204 — to impose monetary penalties for settlement failures, arguing that the current close-out-only remediation framework creates insufficient deterrence for large institutions that can absorb the cost of pre-borrowing requirements rather than modifying their short selling practices. That petition remains pending as of June 2026, with no formal Commission rulemaking response published. The Commission's regulatory agenda under Chair Atkins does not specifically identify Rule 204 as a rulemaking priority, and no formal proposals to amend the rule's close-out framework had been published through June 2026.

Enforcement Context and SEC Action Patterns

Rule 204 enforcement arises in two primary contexts. The first involves participants that fail to close out fail-to-deliver positions within the applicable deadlines — either failing to identify the fails in time to effect close-out by the required market open deadline, or knowingly allowing fails to persist in violation of the rule's mandatory requirements. FINRA has identified Rule 204 close-out procedure deficiencies as a recurring examination finding, noting that some broker-dealers lack adequate real-time fail monitoring systems that would enable them to identify T+2 close-out obligations before the applicable market open deadline.

The second enforcement context involves violations of Rule 204(b)'s pre-borrow consequence — cases where a broker-dealer that is subject to the pre-borrow prohibition because its clearing firm has an unclosed fail continues to accept or effect short sales in the affected security without first pre-borrowing. The Commission has emphasised that the pre-borrow requirement applies to all broker-dealers submitting trades through a clearing participant with an unclosed fail, not merely to the participant itself — a scope that requires broker-dealers to maintain real-time awareness of their clearing firm's fail status in specific securities to avoid unknowing violations.

The anti-sham provision of Rule 204(f) has been applied in enforcement contexts involving broker-dealers that engaged in nominal close-out transactions — purchasing securities through arrangements where the counterparty was known to be unable to deliver — solely to remove the fail position from records while maintaining the economic exposure of the underlying short position. These sham close-out transactions are treated as violations of both Rule 204(f) and the broader antifraud provisions of Section 10(b) and Rule 10b-5.

Examination Relevance and Key Takeaways

Rule 204 is examined at the Series 7 level as the close-out component of Regulation SHO's three-part framework. The mandatory close-out deadlines — market open on the settlement day following settlement date for short sale fails, and market open on the third settlement day following settlement date for long sale and bona fide market making fails — are the primary examination content, expressed in the T+1 settlement context as T+2 and T+4 respectively. The Rule 204(b) pre-borrow consequence — which eliminates the locate option and requires actual pre-borrowing for all short sales in a security where the participant has an unclosed fail — is consistently examined as the significant regulatory consequence that creates the incentive for prompt close-out compliance.

The key points to retain are these. Rule 204 requires participants of registered clearing agencies to close out fail-to-deliver positions in equity securities within mandatory deadlines. For short sale fail-to-deliver positions, the close-out deadline is market open on the settlement day following settlement date — T+2 under T+1 standard settlement. For long sale and bona fide market making fail-to-deliver positions, the deadline is market open on the third consecutive settlement day following settlement date — T+4 under T+1 settlement. Where a participant fails to close out within the required time, the participant and all broker-dealers for which it clears are subject to a pre-borrow requirement for all short sales in the affected security until the fail is closed out and the purchase has cleared and settled. Fail-to-deliver positions may be allocated from a clearing participant to individual broker-dealers whose short positions generated the fail, with the close-out obligation transferring to the allocated broker-dealer. Sham close-out transactions do not satisfy Rule 204's requirements. 

Rule 204 was last amended April 15, 2024 to reflect T+1 settlement cycle deadlines. No formal rulemaking to amend Rule 204 had been published through June 2026.