Bank Trading vs. Market Making: A Plain-English Volcker Rule Guide

Why a Rule About Trading Matters

Banks sit inside the federal safety net. They take deposits, lend, and help markets work. Because they enjoy that protection, the Volcker Rule tells them they cannot also behave like hedge funds. The rule, added by the Dodd-Frank Act, generally prohibits banking entities—insured banks and the companies affiliated with them—from engaging in proprietary trading. In plain terms, that means a bank should not buy or sell securities, derivatives, commodity futures, and related options for its own account in the hope of profiting from short-term price moves. On Wall Street, this is called prop trading.

The same rule restricts banks from owning, sponsoring, or maintaining certain relationships with hedge funds and private equity funds, which the regulations call covered funds. If the first half of the Volcker Rule is about not gambling in the markets, the second half is about not using the bank’s protected balance sheet to run a private investment fund.

Markets Still Need Banks as Middlemen

Banning all trading would hurt ordinary investors. Consider a pension fund that needs to sell a large block of corporate bonds quickly. There may be no obvious buyer at that moment. A bank’s market-making desk can step in, buy the bonds, hold them for a short time, and resell them to other customers. The bank is serving customers, not betting on the market. The Volcker Rule permits this kind of market making, along with underwriting—helping companies bring new securities to investors—risk-mitigating hedging, trading in government obligations, and acting as agent, broker, or custodian.

The policy idea is simple: a bank can be a middleman, but it should not be a speculator with its own capital. The practical part is much harder.

The Blurry Line Between Service and Speculation

A proprietary trade and a market-making trade can look exactly the same in a database. Suppose a bank buys 100,000 shares of a carmaker. If the bank’s traders bought because they expected the stock to rise, that is a proprietary bet. If a client wanted to sell a large block and the desk took it temporarily to serve that client, it looks like market making. The trade ticket is similar; the reason and the customer connection are different.

Regulators cannot read minds, so they look at behavior and structure. Is the desk customer-facing? Is its inventory within internal risk limits? Are those limits based on the reasonably expected near-term demand of customers? Under the 2019 revisions, a trading desk that relies on the market-making or underwriting exemption gets a presumption of compliance when its trading stays inside limits set that way. In other words, the customer connection is what saves the trade.

How Regulators Check the Details

Large banks with significant trading operations face heavy compliance duties. They must have a detailed compliance program, independent testing, and a chief executive who annually attests in writing that the program is designed to achieve compliance. That attestation is not a formality; it puts a senior person’s credibility behind the controls.

Regulators also collect data. Banks with serious trading activity report something called FR VV-1, a quarterly filing built from daily trading-desk data. It includes value-at-risk—a statistical estimate of how much a position could lose under normal market moves—as well as profit and loss, the risk factors driving that profit and loss, inventory, and customer-facing transactions. Supervisors use this information to decide whether a desk’s activity is really about customers or quietly closer to proprietary trading.

The reporting threshold is high. After the 2019 changes, banks with average gross trading assets and liabilities of $20 billion or more over the prior four quarters, excluding U.S. government obligations, must file. As of that rule change, fewer than 20 firms were required to report, but together they covered about 93 percent of U.S.-based trading activity.

Smaller Banks Get a Lighter Touch

The Volcker Rule is calibrated by size. Community banks with total consolidated assets of $10 billion or less and trading assets and liabilities of 5 percent or less of total consolidated assets are generally excluded. Smaller, less complex institutions have reduced compliance requirements. And a bank that does not engage in covered trading activities does not need to build a compliance program at all.

The Rule Has Been Revised—and Debated

The Volcker Rule is not frozen. It was first implemented by five federal agencies in 2013, with a conformance period that gave banks time to bring their activities into line. Regulators then simplified and tailored the rule in 2019, effective in 2020, with a compliance date in 2021. The covered-fund provisions were modified again in 2020, including how certain foreign funds are treated and allowing banks to offer services that do not raise the concerns the rule was designed to address.

Not everyone supported the 2019 changes. Federal Reserve Governor Lael Brainard voted against the final rule, although she backed the community-bank exemption and other changes required by law. She warned that the revisions weakened core protections against speculative trading within the federal safety net, narrowed the CEO attestation requirement, relied heavily on banks policing themselves, and no longer required firms to promptly report breaches of their internal limits. She also noted that the standalone “short-term intent” test was removed for most entities, even though it had not been proposed in the initial draft. Under that earlier test, regulators asked whether a position was taken with the intention of profiting quickly; without it, enforcement leans even more on limits and data.

Supporters of the revisions said they offered greater clarity and certainty for permitted activities while continuing to prohibit proprietary trading. The agencies expected the universe of trades considered prohibited proprietary trading to remain generally the same as under the 2013 rule. The guardrail has not disappeared, but it is being watched and measured differently.

What This Means When You Trade

When investors buy or sell quickly, a market-making desk is often part of the machinery that helps make the trade possible. That is the customer-facing work the Volcker Rule tries to preserve. The ban on proprietary trading is about protecting banks’ capital and the broader financial system, not about making life harder for people who buy and sell investments.

None of this tells you which stocks to buy, and it cannot predict where markets are headed. Financial regulation is technical, and questions about foreign funds or cross-border activities can get complicated. But the next time you hear “proprietary trading” and “market making,” you will understand the difference: one is the bank betting with its own money, and the other is the bank serving its customers, watched by limits, data, and careful regulators.