Transactions with Customers
SERIES 7 | SERIES 24 | FINANCIAL REGULATION COURSES
FINRA Rule 2100 is the series-level marker for the Transactions with Customers subsection of the 2000 Duties and Conflicts rules — the organizational designation grouping the rules that govern how member firms and their associated persons conduct business in customer transactions, including the recommendations framework, pricing fairness standards, commission and markup requirements, net transaction disclosure obligations, and related customer-protection provisions. FINRA Rule 2100 has no operative text of its own. Its FINRA.org page returns only the title — 2100. TRANSACTIONS WITH CUSTOMERS — with no rule text, no amendment history, and no selected notices. It serves exclusively as the organizational container for the child rules it houses.
FINRA Rule 2100 sits within the 2000 Duties and Conflicts series, immediately following FINRA Rule 2090's Know Your Customer provisions and immediately preceding FINRA Rule 2110's Recommendations series marker — the first substantive child rule of the 2100 subsection.
The 2100 Subsection's Scope and Organization
FINRA Rule 2100's subsection organizes the specific transactional obligations applicable when member firms and associated persons engage directly with customers in investment banking and securities activities. The subsection begins with the recommendations framework — establishing the obligation to recommend only what is suitable for the customer (FINRA Rule 2111) and the additional considerations applicable when recommending OTC equity securities (FINRA Rule 2114) — and then addresses the pricing and compensation framework through which those transactions are executed and compensated, including the fair prices and commissions standard (FINRA Rule 2121), the markup framework for debt securities (FINRA Rule 2122), and the disclosure and consent requirements for net transactions (FINRA Rule 2124).
The recommendations and pricing frameworks within FINRA Rule 2100's subsection represent the two most directly customer-impacting dimensions of member conduct — the quality of the advice given to customers (recommendations suitability) and the economic terms on which transactions are executed (fair pricing and appropriate compensation). Together, these two dimensions establish the baseline standard of care applicable to member firms in their transactional dealings with customers — a standard whose practical implementation depends on the supervisory framework FINRA Rule 3110 requires, the know-your-customer foundation FINRA Rule 2090 establishes, and the broader commercial honor standard FINRA Rule 2010 embodies.
FINRA Rule 2100's Position Within the 2000 Duties and Conflicts Framework
FINRA Rule 2100's position within the broader 2000 Duties and Conflicts series — following FINRA Rules 2010 through 2090's fundamental standards and preceding FINRA Rules 2110 through 2130's specific transaction rules — reflects the logical progression from general to specific that characterizes the 2000 series overall. FINRA Rule 2010 establishes the foundational commercial honor standard applicable to all member conduct. FINRA Rules 2020 through 2090 establish specific prohibitions and obligations — against fraudulent devices, pay-to-play activities, payments to unregistered persons, use of fiduciary information, and the know-your-customer baseline. FINRA Rule 2100's subsection then addresses the specific context of customer transactions — translating the general commercial honor obligation into the concrete transactional standards applicable when members actually execute business with customers.
The Child Rules of the 2100 Subsection
The confirmed child rules of FINRA Rule 2100's Transactions with Customers subsection, as displayed on the FINRA.org 2000 series page, include:
FINRA Rule 2110, Recommendations — the series marker for the recommendations sub-grouping within the 2100 subsection, examined in the next entry of this dictionary.
FINRA Rule 2111, Suitability — the comprehensive suitability obligation requiring members and associated persons to have a reasonable basis to believe a recommended transaction or investment strategy is suitable for the customer based on the customer's investment profile. This rule — superseding and substantially expanding on the prior NASD Rule 2310 suitability standard — is among the most frequently tested provisions across the Series 7, Series 24, Series 65, and SIE examinations.
FINRA Rule 2114, Recommendations to Customers in OTC Equity Securities — establishing additional considerations applicable when recommending OTC equity securities, including the obligation to review publicly available information and have a reasonable basis for believing the security is a suitable investment before recommending it.
FINRA Rule 2120, Commissions, Mark Ups and Charges — the series marker for the pricing-and-compensation sub-grouping, examined in this dictionary's entry on that rule.
FINRA Rule 2121, Fair Prices and Commissions — the foundational fair pricing standard requiring that members buy or sell at a price that is fair and reasonable, taking into consideration all relevant facts and circumstances.
FINRA Rule 2122, Charges for Services Performed — governing markups and markdowns for transactions in debt securities other than municipal securities.
FINRA Rule 2123, Charges and Fees — governing charges and fees for services performed by member firms.
FINRA Rule 2124, Net Transactions with Customers — requiring disclosure to and consent from customers before executing transactions on a net basis.
FINRA Rule 2130, Payments Involving Publications that Influence the Market Price of a Security — addressing conflicts of interest in payments related to publications that affect securities prices.
Connection to FINRA Rules 2010, 2090, 2110, 2111, 2114, 2120, 2121, 2122, 2124, 3110, and the Series 7 Examination
FINRA Rule 2100 connects to FINRA Rule 2010 — as the foundational commercial honor standard whose specific transactional expression the 2100 subsection's rules represent. It connects to FINRA Rule 2090 — as the know-your-customer baseline upon which the recommendations framework of FINRA Rules 2110 and 2111 depends, with customer information gathering (Rule 2090) being the prerequisite for suitable recommendations (Rule 2111). It connects to each of its child rules — FINRA Rules 2110, 2111, 2114, 2120, 2121, 2122, 2123, 2124, and 2130 — as the organizational container that groups these rules as a subsystem addressing the transactional dimension of member-customer dealings. And it connects to FINRA Rule 3110 — whose supervisory system requirements must encompass the specific transactional standards the 2100 subsection establishes, with written supervisory procedures addressing recommendations suitability and pricing fairness as core elements of any FINRA-compliant supervisory framework.
Examination Relevance and Key Takeaways
FINRA Rule 2100 is tested on the Series 7 and Series 24 examinations as the series-level marker for the Transactions with Customers subsection — the organizational framework grouping the recommendations, pricing, and customer-transaction-protection rules that represent the most directly applicable standards for registered representatives engaging in customer business.
The key points to retain are these: FINRA Rule 2100 has no operative text — it serves purely as the organizational marker for the Transactions with Customers subsection of the 2000 Duties and Conflicts rules; its child rules address the two central dimensions of member-customer transactional conduct — the recommendations framework (FINRA Rules 2110, 2111, 2114) and the pricing and compensation framework (FINRA Rules 2120, 2121, 2122, 2123, 2124); and its position within the 2000 series reflects the progression from general commercial honor standards (FINRA Rule 2010) through specific obligations (FINRA Rules 2020–2090) to the transactional context where those general standards are most directly applied (FINRA Rule 2100's subsection).
