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WFN QUICK BRIEF · UNDER 1 MIN
The short version
MODE 2 OF 2
What the primary record establishes
Under FINRA Rule 5320, a member holding an unexecuted customer equity order is generally prohibited from trading the same security on the same side for itself at a price that would satisfy that order, subject to the rule’s conditions and exceptions. FINRA Rule 5320 — Prohibition Against Trading Ahead of Customer Orders ↗
What the distinction changes
A review therefore needs a sequence of events, rather than just a daily total. A proprietary fill and a customer fill can coexist while leaving questions about timing, executable price and protected quantity.
What to check before drawing a conclusion
The supplementary material contains exceptions, including provisions for institutional or large orders and information barriers. Their conditions must be examined; an exception label alone is not evidence that its requirements were met.
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WFN STORY COMPASS
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Original WFN vector illustrationWFN · 23 October 2026
Editorial noteSource-based explanation with original WFN analysis. Historical records retain their dates; numerical examples are illustrative. The original vector illustration is conceptual and is not documentary evidence.
WFN REALITY LEDGER
What is on the record?
Primary-source explainer
Primary-source explainer
Primary record / reference periodCurrent FINRA Rule 5320 text checked 23 October 2026; customer equity orders
The linked source supports the documented record; WFN interpretation and illustrative examples are separate.
The rule concerns customer equity-order protection. Its price, side, size and exception conditions matter more than the slogan “customers first”.
01 · VERIFIED RECORD
What the primary record establishes
Under FINRA Rule 5320, a member holding an unexecuted customer equity order is generally prohibited from trading the same security on the same side for itself at a price that would satisfy that order, subject to the rule’s conditions and exceptions. FINRA Rule 5320 — Prohibition Against Trading Ahead of Customer Orders ↗
The stated alternative requires immediate subsequent customer execution up to the proprietary trade’s size at the same or a better price. The rule also requires a written, consistently applied methodology for execution and pending-order priority. FINRA Rule 5320 — Prohibition Against Trading Ahead of Customer Orders ↗
02 · WFN EDITORIAL ANALYSIS
What the distinction changes
A review therefore needs a sequence of events, rather than just a daily total. A proprietary fill and a customer fill can coexist while leaving questions about timing, executable price and protected quantity.
WFN’s analytical focus is the matching condition: security, side, price and size must be compared before treating two trades as equivalent. An end-of-day average can conceal information necessary for that comparison.
03 · REVIEW POINTS
What to check before drawing a conclusion
The supplementary material contains exceptions, including provisions for institutional or large orders and information barriers. Their conditions must be examined; an exception label alone is not evidence that its requirements were met.
Retain the customer instruction, receipt time, proprietary execution and any customer allocation with the relevant disclosures. This is a source-based explanation of a U.S. equity rule, not a conclusion about a named broker or a universal retail-FX execution standard.
