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Volcker Rule

A U.S. banking regulation, part of the Dodd-Frank Act, that restricts banks from trading securities for their own profit and limits their ownership of or ties to hedge funds and private equity funds.

What Is the Volcker Rule?

The Volcker Rule is a section of the Dodd-Frank Act of 2010, the U.S. financial reform law passed after the 2008 financial crisis. It is named after Paul Volcker, a former chairman of the Federal Reserve. The rule limits how banks and their affiliated companies can trade and invest with their own money. Its central goal is to keep federally insured deposit-taking institutions from taking speculative risks that could threaten the wider financial system.

How It Works

The rule has two main parts. The first restricts proprietary trading, in which a bank buys and sells securities or other financial instruments mainly to profit for its own account rather than to serve customers. The second limits banking entities from owning or sponsoring hedge funds and private equity funds, and from making large investments in them.

The rule includes exemptions. Banks may still engage in activities that serve customers, such as market making, underwriting new securities, and hedging risks arising from their own business. They may also trade certain government obligations. Distinguishing a permitted market-making trade from prohibited proprietary trading has been one of the rule's most debated challenges, and regulators have revised the rule over time to clarify and simplify it.

Why It Matters to Investors

For individual investors, the Volcker Rule is mainly relevant as a structural feature of the banking sector. By separating some speculative trading from deposit-taking banks, the rule aims to reduce the chance that losses at large banks spread to the broader economy, which is one way regulators address systemic risk. Critics have argued that the restrictions can reduce banks' market liquidity and make trading more costly, while supporters contend that they lower the risk of taxpayer-funded bailouts.

The rule does not guarantee the performance of any bank or stock. Investors who follow banks often watch how these restrictions shape firms' trading revenue and business mix.

Updated November 2, 2026. For general education only; not financial, tax or legal advice.

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Related Terms

Dodd-Frank Wall Street Reform and Consumer Protection Act (Dodd-Frank Act)

The Dodd-Frank Wall Street Reform and Consumer Protection Act is a 2010 U.S. federal law that overhauled financial regulation after the 2008 financial crisis, creating new oversight bodies and rules for banks and markets.

Proprietary Trading

Proprietary trading is when a firm buys and sells financial instruments using its own capital rather than client money, keeping the profits and absorbing the losses from those trades.

Hedge Fund

A hedge fund is a privately organized, actively managed investment pool, usually open only to wealthy or institutional investors, that uses strategies such as leverage and short selling to pursue returns.

Systemic Risk

Systemic risk is the possibility that the failure of one institution, market or part of the financial system triggers widespread disruption across the whole financial system or economy.

Too Big to Fail (TBTF)

Too Big to Fail is the idea that some institutions are so large or interconnected that their collapse would cause severe damage to the wider economy, prompting governments to rescue them.