SEC NMS Stock Quote Tick Sizing


On Dec. 14, SEC proposed adopting variable minimum increments.


  • SEC proposed new minimum pricing increments for NMS stock quotations and orders.
  • Proposal also addresses access fee caps and accelerating round/odd lot info definitions.
  • Regulation National market system (Reg NMS) provisions codified under 17 CFR 242.
  • Objective, as noted by chair Gensler in his comments, is to ensure transparency and market competition while deterring off-exchange, wholesale, and dark pool operations.
  • Commissioner Uyeda statement supported issuance, but not all elements, of proposal.
  • Issued concurrent with final insider trade rule, #123999; enhanced order competition, #156501; order execution disclosure, #156509, best execution, #156490 proposals.
  • Minimum Pricing Increments
  • Amend NMS Rule 612 to allow sub-penny bid-ask spreads on exchanges, alternative trading systems (ATS), and OTC for NMS stocks greater $1; those less $1 do not apply.
  • The minimum pricing increment, $0.001, $0.002, $0.005, or $0.01, is based on the time weighted average quoted spread for the NMS stock during the evaluation period.
  • Rule 612, Minimum pricing increment, provisions are codified under 17 CFR 242.612.
  • Access Fees
  • Amend and add new section to Rule 610 to reduce access fees and monitor rebates.
  • Reduce access fee caps for protected quotations in NMS stocks priced $1.00 or more to $0.0005 per share for NMS stocks that have a minimum pricing increment of $0.001.
  • For minimum pricing increment greater $0.001, the cap would be $0.001 per share.
  • For quotations in NMS stocks priced less $1.00, the cap would be 0.05% of the quote.
  • Also, add a subsection, Transparency of fees, to prohibit fees, rebate, or remuneration.
  • Should an exchange choose to use a fee or rebate based on volume thresholds, said threshold would need to be set for a specific period prior to fee/rebate assessment.
  • For Rule 610, Access to quotations, provisions are codified under 17 CFR 242.610.
  • Market Data Infrastructure
  • Given delays in SEC's implementation of Market data infrastructure (MDI) rules, accelerate round lot and odd-lot information definitions, to best meet investor needs.
  • For round lot, accelerating use of the definition would enhance and better disseminate price transparency, for stocks priced greater $250, in trade sizes less than 100 shares.
  • In addition, would result in quote and order pricing better than the prevailing NBBO.
  • Separately, amend odd-lot definition to require the identification of best odd-lot order.
  • Accelerating the odd-lot information definition would improve information asymmetries that currently exist between propriety and securities information processor (SIP) data.
  • Rules to be amended are NMS Rule 600(b)(59), Odd lot information, 17 CFR 242.600(b)(59); Rule 600(b)(78), Regulatory data requirements, 17 CFR 242.600(b)(78); Rule 603: Distribution, consolidation, display of NMS stock data, 17 CFR 242.603
  • Commissioner Uyeda Statement
  • Advocated that since Reg NMS adoption, the dominance of electronic trading, faster speeds, and processing power have necessitated review of increments, or tick sizes.
  • Noted the precarious nature of setting the increments for national market systems.
  • Where tick sizes too large may constrain liquidity and effective market competition.
  • The commissioner did question the proposal's extension of minimum tick sizes to order execution, where the application of the tick size may not necessarily be beneficial.
  • Consultation
  • Comments due later of Mar. 31, 2023, or 60 days after publication in federal register.
  • Dec. 14, 2022 SEC Peirce Remarks
  • On Dec. 14, 2022, SEC commissioner Peirce issued statement on the rule proposal.
  • Peirce supported putting the proposal out for public comment; noted she is persuaded some stocks trading on our national securities exchanges are tick-constrained.
  • Prefer SEC get out of rate-setting altogether, but requires significant market overhaul.
  • Due to ongoing existence of order protection rule, need prevent excessive access fees.
  • Need input whether reduction in access cap fees, tick sizes calibrated at right levels.
  • Said SEC could have made it easier for commenters to analyze effects on market.
  • Concerned with proposal to mandate uniform trading increments across market for NMS stocks; may not agree with rationale; not given equal weight in all proposals.
  • Dec. 29, 2022 Fed Reg Proposal
  • On Dec. 29, 2022, SEC published proposal in federal register, comment Mar. 31, 2023.
  • Mar. 2023 ICI Comment Letter
  • On Mar. 31, 2023, ICI submitted comment letter to SEC proposal on order competition.
  • Recommended SEC take incremental approach, first with dissemination of new round lot sizes and odd lot information in NMS core data before pursuing other changes.
  • Strongly opposed the multiple new sub-penny increments to a broad swath of stocks.
  • Urged SEC to apply half-penny increment only to stocks that consistently demonstrate as tick-constrained; need more modest approach to reducing quoting tick increment.
  • In Mar. 2023, SIFMA issued comments suggesting changes to proposal, see #168466.
  • Sep. 2024 SEC Final Rule
  • On Sep. 18, 2024, SEC adopted amendments to certain rules of Regulation NMS.
  • Amended the minimum pricing increments for the quoting of certain NMS stocks, reduce the access fee caps, and enhance the transparency of better priced orders.
  • Per fact sheet, established second minimum pricing increment, also known as tick size, of $0.005 under Rule 612 of Regulation NMS for the quoting of certain NMS stocks.
  • Reduced access fee caps under Rule 610 of Regulation NMS and require national securities exchanges to make amounts of all fees, rebates determinable at execution.
  • Accelerated implementation of the round lot and odd-lot information definitions adopted in 2020 under the Market data infrastructure rules (MDI Rules), see #71966.
  • Added information about the best odd-lot order to the definition of odd-lot information.
  • Commission adopted amendments to 17 CFR 242.600(b)(69), 17 CFR 242.600(b)(89), 17 CFR 242.600(b)(93), 17 CFR 242.603, 17 CFR 242.610 and 17 CFR 242.612.
  • Chair Gensler, Commissioners Crenshaw, Peirce, Uyeda, Lizarraga issued statements.
  • The SEC also made available, the comment letters received on the proposing release.
  • Effective 60 days after date of publication of the adopting release in federal register.
  • For Rule 612, Rule 610, round lot definition, compliance date will be first business day of Nov. 2025; for odd-lot information, date will be the first business day of May 2026.
  • Oct. 2024 Fed Reg Final Rule
  • On Oct. 8, 2024, SEC issued final rule on minimum increments, in the federal register.
  • Effective on Dec. 9, 2024; compliance dates include first business day of Nov. 2025 for Rules 600(b)(89)(i)(F), Rules 600(b)(89)(iv), 600(b)(93) and 603(b)(3), 610 and 612.
  • Compliance date first business day of May 2026 for Rules 600(b)(69) and 603(b)(3).

Regulators ICI; SEC
Entity Types B/D; Depo; Exch; OTC
Reference ICI: PR, Lt, 3/31/2023; SEC: 89 FR 81620, 10/8/2024; Sp, PR 2024-137, RF 34-101070, Info, 9/18/2024; 87 FR 80266, 12/29/2022; RF RN 34-96494, PR 2022-224, Sp, FAQ, 12/14/2022; File No. S7-30-22; RIN 3235-AN23; Regulation NMS; Rule 600(b)(59); Rule 600(b)(78); Rule 603; Rule 612; Citation: *17 CFR* 242, 242.600(b)(59), 242.600(b)(69), 242.600(b)(78), 242.600(b)(89), 242.600(b)(93), 242.603, 242.610, 242.612;
Functions Compliance; Financial; Legal; Operations; Product Administration; Technology; Trade Reporting; Trading; Treasury
Countries United States of America
Category
State
Products Equity; Securities
Regions Am
Rule Type Final
Rule Date 12/14/2022
Effective Date 12/9/2024
Rule Id 156494
Linked to Rule :156509
Reg. Last Update 10/8/2024
Report Section US Investment

Last substantive update on 10/09/2024