Phrases & IdiomsPhrase guide

Customer Under Regulation NMS

Under current U.S. Regulation NMS, “customer” means any person that is not a broker or dealer. This is the rule-specific definition in 17 CFR § 242.600 and should not be generalized to every securities-law or ordinary-language use of customer.

Quick answer

Under current U.S. Regulation NMS, “customer” means any person that is not a broker or dealer.

Key details

Canonical FormCustomer Under Regulation NMS
Core MeaningUnder current U.S. Regulation NMS, “customer” means any person that is not a broker or dealer.

Further guidance

History Boundary

This is the rule-specific definition in 17 CFR § 242.600 and should not be generalized to every securities-law or ordinary-language use of customer.

Meaning

Under current U.S. Regulation NMS, “customer” means any person that is not a broker or dealer.

Usage Boundary

This is the rule-specific definition in 17 CFR § 242.600 and should not be generalized to every securities-law or ordinary-language use of customer.

Sources and evidence

Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.

  1. 17 CFR § 242.600 — NMS security designation and definitions (opens in a new tab)Legal Information Institute, Cornell Law School · Current e-CFR text for Regulation NMS definitions, including average midpoint and spread metrics, protected quotation and trade-through terms.

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