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Why History Matters for Investors

Regulators Always Fighting the Last Financial War

Pomegra Learn

Why Do Regulators Always Fight the Last Financial War?

There is an iron law of financial regulation: every major regulatory reform is designed to prevent the last crisis, not the next one. The rules enacted after the 1929 crash constrained bank leverage and securities fraud—not the specific dynamics that would produce the 1987 crash. The rules enacted after 1987 introduced circuit breakers—not the mortgage securitization dynamics that would produce 2008. The Dodd-Frank Act addressed bank leverage and derivatives clearing—not the cryptocurrency volatility that would produce 2022's losses. Regulators are perpetually fighting the last war because crises always take new forms.

Quick definition: Regulatory lag refers to the structural tendency of financial regulation to address the instruments, practices, and vulnerabilities identified in the most recent crisis while leaving the financial system exposed to the novel forms of the same underlying dynamics that will produce the next crisis.

Key takeaways​

  • Every major regulatory reform in history has addressed the specific instruments of the previous crisis, not the general structural dynamics.
  • The financial industry's incentives drive innovation into the areas least covered by existing regulation—regulatory arbitrage is a permanent feature of the financial system.
  • Regulatory capture—the tendency of regulated industries to influence the regulators that oversee them—reduces the effectiveness of post-crisis reforms over time.
  • Better regulation is possible, but no regulatory framework has successfully prevented speculative excess when credit conditions are permissive.
  • The SEC (sec.gov) and Federal Reserve (federalreserve.gov) provide current regulatory information; investors should confirm that cited regulations remain in force.
  • Historical regulatory failures discussed here are well-documented but complex; this treatment summarizes rather than exhaustively analyzes them.

The Bubble Act of 1720: the original overreaction​

The Bubble Act, passed by the British Parliament in June 1720—at the height of the South Sea Bubble—prohibited the formation of joint-stock companies without a royal charter. It was designed to prevent the proliferation of copycat bubble companies that had formed alongside the South Sea Company, all promoting schemes of varying implausibility.

The act passed, the bubble burst, and the regulation remained in force for more than a century. It did not prevent subsequent speculative episodes—the early nineteenth century railroad mania proceeded through companies that had obtained the required charters. It did, however, restrict legitimate business formation and capital raising for a generation. The regulatory response was disproportionate, addressed the wrong problem (the existence of joint-stock companies rather than the speculative excess that had driven their prices), and produced its own economic costs.

Glass-Steagall and its repeal​

The Banking Act of 1933—commonly known as Glass-Steagall—was the definitive regulatory response to the 1929 crash and the subsequent banking failures. It separated commercial banking from investment banking, established the FDIC to insure deposits, and gave the Federal Reserve authority to set margin requirements for stock purchases. It addressed, directly and substantially, the specific mechanisms that had amplified the 1929 crisis.

But it was designed for 1929. By the 1980s, financial innovation—money market funds, commercial paper markets, junk bonds—had created new credit channels outside Glass-Steagall's scope. The gradual erosion of the act's provisions over the 1980s and 1990s, culminating in its formal repeal by the Gramm-Leach-Bliley Act of 1999, reflected both legitimate arguments that the separation was no longer meaningful and the financial industry's successful lobbying campaign. The repeal did not cause the 2008 crisis—most of the problematic activities took place at institutions not directly constrained by Glass-Steagall—but it symbolizes the regulatory cycle of reform, erosion, and eventual failure.

Dodd-Frank and its limitations​

The Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 was the most comprehensive financial regulatory reform since the 1930s. It introduced systemically important financial institution designations with enhanced oversight, required central clearing for standardized derivatives, created the Consumer Financial Protection Bureau, implemented the Volcker Rule restricting bank proprietary trading, and required stress testing of large banks.

These reforms addressed the specific failures identified in 2008: excessive leverage at large banks, opaque derivatives markets, inadequate consumer mortgage disclosures. They were genuinely valuable and almost certainly reduced the risk of a 2008-style crisis repeating immediately.

But they left shadow banking—including money market funds, hedge funds, and private credit—substantially less regulated than traditional banks. This created incentives to shift risk into less regulated channels, which is exactly what happened over the following decade. By the early 2020s, the private credit market had grown to trillions of dollars of largely unregulated lending, concentrated in assets with less liquidity than public markets.

Real-world examples​

The margin requirement changes enacted after 1929 constrained broker call loans to 50 percent of asset value—directly addressing the 10 percent margins that had amplified the 1929 crash. The 1987 crash, however, was driven not by individual margin loans but by portfolio insurance strategies and computer-driven program trading—neither of which was affected by margin requirements on individual stock purchases.

After 1987, circuit breakers were installed to halt trading when markets declined rapidly. Circuit breakers function well against the specific type of cascade selling that characterized Black Monday. They do not address slow-moving credit crises of the 2008 type, where the key problem was not market price volatility but the opacity and overleverage of structured products.

The post-2008 stress tests required banks to model their losses under severe scenarios including housing market declines. This directly addressed the under-estimation of housing risk that characterized 2008. But the stress tests do not model, for example, a rapid rise in interest rates combined with a severe recession—the scenario that has produced the most recent banking stress in the mid-2020s.

Common mistakes​

Assuming that post-crisis regulation has made the system safe. Post-crisis regulation reduces specific identified risks. It does not address unidentified risks in new financial innovations. The financial system that existed after Dodd-Frank was safer than the one that existed before 2008, but it was not safe.

Trusting that financial innovation is neutral. New financial instruments tend to emerge in the regulatory gaps created by post-crisis reforms. This is not accidental—the financial industry has strong incentives to create products that achieve risk-taking objectives outside regulatory constraints.

Conflating regulatory intent with regulatory effect. Well-intentioned regulations often have unintended consequences. Policies designed to encourage homeownership contributed to the housing bubble. Policies designed to encourage stable money market funds created the commercial paper market dependence that amplified the 2008 panic.

Ignoring international regulatory arbitrage. When one jurisdiction tightens regulation, activity may migrate to less regulated jurisdictions. The Eurodollar market of the 1960s–1980s developed partly to avoid U.S. banking regulation. Crypto exchanges relocated offshore partly to avoid U.S. securities regulation.

Treating regulatory reform as a substitute for macroprudential policy. Structural reforms address specific instruments and institutions. Macroprudential tools—countercyclical capital buffers, loan-to-value restrictions, margin requirements—aim to address the credit cycle directly. Both are necessary; neither alone is sufficient.

FAQ​

Is there any regulatory framework that has successfully prevented a major crisis?​

The post-WWII period of roughly 1945–1971 in the United States featured strict Glass-Steagall separation, heavy capital requirements, Regulation Q interest rate ceilings, and tight mortgage standards. This period had no major financial crises, though it also featured limited financial innovation and credit access. The regulatory framework was genuinely effective—at the cost of significant economic rigidity.

Can regulation keep up with financial innovation?​

In principle, principles-based regulation—which captures the intent of rules rather than specific instruments—is more adaptable than rules-based regulation. In practice, financial institutions are sophisticated at identifying the boundaries of any regulatory framework and operating as close to those boundaries as profitability permits.

Who determines the regulatory agenda after a crisis?​

The regulatory agenda is determined by a complex political economy involving legislators, regulatory agencies, academic economists, the financial industry's lobbying apparatus, and public opinion. After major crises, public anger creates political space for significant reform; as the crisis recedes, the financial industry's regulatory advantages in information, technical expertise, and political relationships tend to reassert themselves.

Does international coordination help?​

The Basel Capital Accords—international agreements on bank capital requirements—represent the most successful example of international regulatory coordination. But Basel III, enacted after 2008, took more than a decade to be fully implemented and was amended significantly in the process. International coordination helps but is slow.

What should investors do with the knowledge that regulation is imperfect?​

Accept that the financial system is permanently exposed to novel risks that current regulation does not address. This means maintaining meaningful diversification across asset classes, avoiding excessive concentration in any sector heavily involved in current financial innovation, and maintaining liquidity that allows rebalancing rather than requiring forced selling during crises.

Are regulators aware of the pattern?​

Yes—"fighting the last war" is a recognized problem in regulatory circles. The challenge is that it requires identifying the next war before it happens, in the face of determined opposition from the financial industry and without the political mandate that only an actual crisis provides.

Does cryptocurrency face the same regulatory cycle?​

Exactly the same. Post-2022 crypto regulation—driven by the FTX collapse and associated frauds—addresses the specific failures of 2022: exchange custody practices, leverage in crypto-specific products, and stablecoin backing. The next crypto crisis will almost certainly take a form not addressed by these regulations.

Summary​

Regulators always fight the last financial war because crises always take new forms, because the financial industry has structural incentives to innovate around regulatory constraints, and because the political process that produces regulation is reactive rather than anticipatory. This does not mean regulation is useless—post-crisis reforms genuinely reduce the specific risks they address. But investors who expect that current regulation has made the system permanently safe are making the same mistake that participants in every previously regulated era have made.

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