Volcker Rule

The Volcker Rule is a post-2008 structural regulation, enacted as Section 619 of the Dodd-Frank Act, that prohibits deposit-taking banks and their affiliates from engaging in proprietary trading — trading for the bank's own profit rather than on behalf of customers — and from owning or sponsoring hedge funds and private equity funds. Named after former Federal Reserve Chairman Paul Volcker, the Rule represents a narrower, more targeted form of ring-fencing than the comprehensive separation of the Glass-Steagall Act: instead of separating entire business lines, it prohibits specific activities deemed to create unacceptable conflicts of interest and systemic risk within federally insured institutions.

The Rule's design reflects the political economy of post-crisis regulation. A full restoration of Glass-Steagall was deemed politically impossible; the Volcker Rule was the compromise, an attempt to achieve some of the benefits of structural separation without the costs of dismantling the universal banking model. The result has been a regulation of enormous complexity — the final implementing rules run to hundreds of pages — that financial institutions have spent billions of dollars complying with and, simultaneously, billions of dollars finding ways around.

The fundamental tension in the Volcker Rule is definitional. Proprietary trading is difficult to distinguish from market-making, hedging, and customer facilitation in practice. Every trade has multiple motives, and the same position can be proprietary in one context and market-making in another. The Rule's attempt to draw a bright line through this ambiguity has produced a compliance architecture of enormous sophistication and questionable effectiveness. The banks that were most active in proprietary trading before 2008 have largely moved those activities to unregulated or less-regulated entities, suggesting that the Rule has been more successful in relocating risk than in eliminating it.

The Volcker Rule is a tribute to the power of named regulation. By attaching a respected central banker's name to a prohibition, Congress created a political asset that has survived repeated attempts at repeal. But the Rule also illustrates the limits of targeted prohibition in a system designed for regulatory arbitrage. A rule that prohibits specific activities within specific institutions will be evaded by changing the institution, the activity, or the accounting that connects them. The Volcker Rule is not a ring-fence. It is a speed bump.