FINRA 5 Percent Policy – What Firms Actually Need to Know
A practitioner’s guide to FINRA Rule 2121 — covering the rule text, the governing case law, how the 5% and 10% thresholds actually work, what FINRA is finding in current exams, and what your firm needs to do to stay compliant.
The Core Obligation
FINRA Rule 2121 — titled “Fair Prices and Commissions” — governs how broker-dealers price transactions with their customers. The rule’s language is deceptively simple: when a firm buys or sells a security for its own account (acting as principal), it must do so at a price that is fair, taking into account all relevant circumstances, including market conditions, expense, and the firm’s entitlement to a profit. When a firm acts as agent, it must not charge more than a fair commission or service charge. Importantly, the obligation runs in both directions. The rule applies equally to markups — when a firm sells to a customer above the prevailing market price — and to markdowns, when a firm buys from a customer below the prevailing market price. Both must meet the same standard of fairness.
“It shall be deemed a violation of Rule 2010 and Rule 2121 for a member to enter into any transaction with a customer in any security at any price not reasonably related to the current market price of the security or to charge a commission which is not reasonable.” FINRA Rule 2121, Supplementary Material .01
Every markup and markdown analysis is anchored to the prevailing market price (PMP) — the price that reflects current market conditions at the time of the transaction. The markup or markdown is the difference between what the customer pays or receives and that PMP. Getting the PMP right is not a technicality; it is the foundation of the entire analysis, and it is where FINRA examiners focus first.
The 5 Percent Policy: What It Is and What It Isn’t
Alongside the rule text, FINRA maintains what is known as the “5 Percent Policy” — an interpretive guideline adopted by the NASD Board in 1943, based on studies showing that the large majority of customer transactions were executed at markups of 5% or less. The Policy has been reviewed and reaffirmed by the FINRA Board of Governors multiple times since then.
Understanding what the 5% figure actually means in practice requires reading it carefully:
What the rule actually says about 5 PercentThe 5 Percent Policy is explicitly a guide, not a rule. Critically, the rule states that a markup pattern of 5% or even less may be considered unfair or unreasonable — and that the percentage of markup is only one of several factors that determine fairness. There is no “safe harbor” at 5%. There never has been.
In today’s markets — far more liquid and transparent than 1943 — FINRA applies considerably more pressure well below the 5% threshold, particularly for listed equities where inter-dealer spreads are tight and execution costs are minimal. A 5% markup on a listed equity transaction will attract significant examiner attention.
The 10% Threshold: Per Se Fraud
While FINRA guidance frames the 5% figure as a guideline, the SEC has established a considerably harder legal line at 10%. This is not a soft regulatory expectation — it is stated explicitly by the SEC in Release No. 34-24368 (April 21, 1987), transmitted to the industry via NASD Notice to Members 87-31:
The Commission consistently has held that, at the least, undisclosed mark-ups of more than 10% above the prevailing market price are fraudulent in the sale of equity securities.”
SEC Release No. 34-24368 (April 21, 1987) — citing In re Alstead, Dempsey & Co.; In re Peter J. Kisch (Release No. 19005, 1982); In re Powell & Associates (Release No. 18577, 1982); James E. Ryan; In re Sherman Cleason (1944); Duker & Duker
This line of administrative decisions — running from Duker & Duker in 1939 through multiple SEC releases — establishes that an undisclosed markup exceeding 10% on an equity security is fraudulent under Section 10(b) of the Exchange Act and Rule 10b-5, as well as Section 17(a) of the Securities Act of 1933.
The standard is stricter for debt securitiesFor debt securities — corporate bonds, municipals, and government securities — the standard is stricter. The SEC has consistently held that markups on debt are expected to be lower than on equities. A markup that might be defensible on an equity may be clearly excessive on a bond of equivalent dollar value.
Disclosure does not cure an excessive markup under FINRA rulesDisclosing the amount of a markup to the customer before the transaction is a relevant factor under Rule 2121 — but it does not render an otherwise excessive or unfair markup permissible. The rule is explicit: disclosure itself does not justify a commission or markup that is unfair in light of all other circumstances. The disclosure defense is available only in the narrower federal fraud analysis — it may defeat the “undisclosed” element of a 10b-5 claim — but it carries no weight under the SRO fair pricing rules, where excessive markups are prohibited whether or not disclosed.
The Seven Factors: How Fairness Is Determined
Rule 2121’s Supplementary Material .01(b) sets out seven factors that firms and regulators must weigh in assessing whether a markup, markdown, or commission is fair. No single factor is determinative — the analysis is always holistic. All seven must be considered:
Determining the Prevailing Market Price
Every markup and markdown analysis begins with the prevailing market price. Rule 2121 and its Supplementary Material .02 (for debt securities) establish a clear hierarchy for determining PMP. Firms must follow this waterfall in order — they cannot skip levels or use a lower-tier source when a higher-tier source is available:
Firms cannot skip levels in this hierarchyUsing quotations from a limited number of market participants when inter-dealer transaction prices are available, or relying on economic models when contemporaneous transactions exist, is itself a Rule 2121 violation — regardless of whether the markup ultimately charged would have been found fair under a correct PMP analysis.
Transactions Covered — and One Key Exemption
The 5% Policy and Rule 2121’s fair pricing obligation apply broadly across transaction types. Firms should not assume the rule is limited to straightforward principal sales from inventory.
Transactions the rule covers
- Principal sales from inventory to customers
- Principal purchases from customers (markdowns)
- Riskless and simultaneous principal transactions
- Agency transactions (commissions)
- Proceeds transactions (see below)
- All security types: equities, bonds, direct participation programs, oil royalties, and others
One key exemption
- New issue / prospectus sales: the 5% Markup Policy does not apply where a prospectus or offering circular is required to be delivered and the securities are sold at the specific public offering price.
Note: municipal securities are subject to MSRB Rule G-30 for debt-specific pricing requirements. The general fair pricing obligation under Rule 2121 continues to apply.
Proceeds transactions require particular attention. When a customer liquidates a position and uses those proceeds to purchase another security at or about the same time, both legs are treated as a single transaction for markup purposes. Any profit the firm realized on the liquidation side must be included in calculating the total markup on the purchase. Firms that treat each leg as a separate, independent transaction — and calculate markups independently on each — are incorrectly applying the rule and likely charging the customer an aggregate amount that would not pass the fairness test if properly measured.
What FINRA Is Finding in Current Examinations
FINRA’s current examination priorities in this area focus heavily on fixed income and principal transactions. The following deficiencies are the most frequently cited:
- Incorrect PMP determination. Firms not following the contemporaneous cost presumption, or bypassing the required waterfall by jumping to quotations or economic models when inter-dealer transaction prices are available. This is the most frequently cited deficiency in markup-related exam findings.
- Inadequate oversight of third-party pricing software. Firms using vendor systems to determine PMP but lacking oversight of how the software establishes prices, not verifying that the firm’s own trade data feeds are complete and accurate, or allowing manual overrides without documented supervision and rationale for each override.
- Stale markup and markdown grids. Relying on fixed pricing grids established years earlier and never updated to reflect changed market conditions, instrument characteristics, or current transaction economics.
- No facts-and-circumstances analysis. Relying solely on grids or fixed thresholds to assess fair pricing — without conducting the actual multi-factor analysis required by the rule — is a supervisory deficiency even if no individual transaction is found to be priced excessively.
- Yield impact not considered for short-term debt. Charging markups on short-maturity fixed income securities that materially reduce the investor’s yield to maturity — sometimes eliminating a significant fraction of available return — without accounting for that impact in the fairness analysis.
- No PMP documentation. Firms are required to document the basis for PMP in each transaction, particularly when departing from the contemporaneous cost presumption. Without this documentation, the firm cannot meet its evidentiary burden if a transaction is challenged in an examination or enforcement proceeding.
Building a Compliant Markup and Commission Program
A sound compliance program in this area rests on three pillars: a written policy that accurately reflects the firm’s actual business and pricing practices; supervisory systems capable of detecting and investigating deviations; and documentation sufficient to support the firm’s positions under examination. Here is what each requires:
Written Policy
- Standard markup and markdown ranges by security type — equities, investment-grade debt, high-yield, municipals, direct participation programs
- An explicit PMP determination methodology that follows the Rule 2121 waterfall in the correct order
- A documentation standard for transactions where contemporaneous cost is not used as PMP, including the specific basis for departing from the presumption
- A proceeds transaction identification and calculation procedure
- A grid review schedule — pricing grids must be reviewed and updated periodically to reflect current market conditions
- Disclosure protocols for markups above standard policy thresholds
Supervisory Systems
- Automated exception reports flagging transactions above defined markup and markdown thresholds by security type
- Periodic recalibration of exception parameters — static exception reports become ineffective as market conditions shift and stop identifying genuine outliers
- Oversight of any third-party PMP software, including verification that firm trading data feeds are complete, accurate, and current
- Supervision of all manual PMP overrides, with documented rationale required for each
- Account-level monitoring: cost-to-equity ratios and turnover ratios for active accounts, with a defined protocol for investigating outliers
Documentation
- PMP determination record for each principal transaction, particularly where the contemporaneous cost presumption is departed from
- Written rationale for exception transactions identifying which of the seven factors apply and what specific work was performed to justify the charge
- Investigation records for all exceptions flagged by supervisory systems, including disposition and any follow-up action taken
- Records of periodic grid and procedure reviews, including what was reviewed, who conducted the review, and what changes were made
The practical testIf a FINRA examiner asks two questions — “how did you determine the prevailing market price for this transaction?” and “what specific factors justify this particular charge?” — can every person who prices transactions at your firm answer both clearly and consistently, with supporting documentation? If not, the compliance program has gaps worth addressing before the next examination cycle.





