Investment Suitability

Regulatory status current as of June 2026 — verify effective dates, dollar thresholds, and pending rulemakings against current SEC/FINRA/FinCEN sources before advising.

Core Concepts

FINRA Rule 2111 — Suitability

The foundational rule requiring that a broker-dealer or associated person have a reasonable basis for believing a recommendation is suitable for the customer. Applies to recommendations of securities and investment strategies involving securities, including recommendations to hold. Three distinct obligations arise from Rule 2111:

Three Suitability Obligations

1. Reasonable-Basis Suitability (Rule 2111.05(a)) The firm or associated person must perform reasonable diligence to understand the nature of the recommended security or strategy, including its risks, rewards, and features. This is a product-level obligation — the representative must understand what they are recommending before recommending it to anyone. A representative who does not understand a complex product cannot satisfy reasonable-basis suitability regardless of how well it might fit a particular customer.

2. Customer-Specific Suitability (Rule 2111.05(b)) The recommendation must be suitable for the particular customer based on that customer's investment profile. The investment profile includes, but is not limited to: age, other investments, financial situation and needs, tax status, investment objectives, investment experience, investment time horizon, liquidity needs, risk tolerance, and any other information the customer discloses.

3. Quantitative Suitability (Rule 2111.05(c)) The firm or associated person must have a reasonable basis for believing that a series of recommended transactions, even if each is individually suitable, is not excessive and unsuitable when taken together in light of the customer's investment profile. The former requirement that the broker have "actual or de facto control" over the account was removed by FINRA's 2020 amendments to Rule 2111 (Regulatory Notice 20-18; SR-FINRA-2020-007, effective June 30, 2020), aligning the obligation with Reg BI's Care Obligation — quantitative suitability now turns on the recommendations alone, without any control element. Key metrics: turnover ratio (annualized), cost-to-equity ratio, and use of in-and-out trading patterns. Generally, turnover ratios above 6 and cost-to-equity ratios above 20% raise presumptive concerns.