Regulation W

What Is Regulation W?

Regulation W is a Federal Reserve rule governing covered transactions between member banks and their affiliates. It implements sections 23A and 23B of the Federal Reserve Act, which are designed to limit a bank's exposure to affiliates and prevent a bank from transferring the benefit of the federal safety net to affiliated companies.

The rule matters because banks often sit inside larger financial groups. Without limits, an insured bank could be used to fund, rescue, or support an affiliate in ways that weaken the bank and expose depositors, the deposit insurance system, or the broader financial system to avoidable risk.

How Affiliate Limits Work

Regulation W applies to covered transactions between a bank and an affiliate. Covered transactions can include loans or extensions of credit to an affiliate, purchases of assets from an affiliate, investments in affiliate securities, guarantees on behalf of an affiliate, and certain transactions that expose the bank to affiliate risk.

The rule generally limits covered transactions with a single affiliate and with all affiliates combined. It also imposes collateral requirements for certain credit transactions and restricts low-quality asset purchases. Section 23B adds a market-terms principle: many transactions with affiliates must be on terms that are substantially the same as, or at least as favorable to the bank as, comparable transactions with unaffiliated parties.

Why Banks and Investors Care

Regulation W is part of the architecture that keeps a bank from being treated as a cash box for the rest of a corporate group. In a holding-company structure, shareholders and management may have incentives to move risk, liquidity, or losses among affiliates. The rule makes those transfers harder when they would disadvantage the bank.

For investors and analysts, affiliate transactions can reveal risk that is not obvious from headline capital ratios alone. A bank that repeatedly supports affiliates, purchases affiliate assets, or extends credit on weak terms may be taking risks that do not look like ordinary customer lending.

Common Misread

Regulation W does not ban all bank-affiliate transactions. Financial groups can still transact with affiliates when the transactions fit the rule, stay within limits, satisfy collateral and quality requirements, and meet market-terms standards. The point is control and insulation, not a total separation of affiliated entities.

The rule also has detailed definitions and exemptions, so practical application can be technical. Compliance teams usually analyze the affiliate status, transaction type, amount, collateral, attribution rule, and available exemptions before a bank enters into a transaction.

What Compliance Teams Test

A Regulation W review usually starts by identifying whether the counterparty is an affiliate and whether the transaction is covered. The team then measures the transaction against single-affiliate and aggregate limits, checks collateral requirements, reviews low-quality asset restrictions, and determines whether the transaction must satisfy market-terms standards.

The attribution rule is especially important because a transaction with a third party may be treated as an affiliate transaction if the proceeds benefit or are transferred to an affiliate. That prevents a bank from avoiding the rule by routing support through an intermediary instead of dealing with the affiliate directly.

The Bottom Line

Regulation W limits how banks transact with affiliates. It protects bank safety by keeping affiliate support, credit exposure, and value transfers within defined boundaries. The rule is one reason bank groups need careful transaction mapping before moving assets, guarantees, or liquidity among related companies.