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Silicon Valley Bank held 209 billion dollars in assets, more than double the US liquidity rulebook's statutory floor. It still had no LCR, no NSFR, and only reduced-frequency stress testing. Not because the rules were lenient, but because the tailoring framework had already sorted it into a category where the full rulebook simply didn't apply. Here's how that four-category system works, and why it became the central liquidity controversy of 2023.
In most liquidity regimes, the interesting question is what a rule requires. In the United States, the first question is who it applies to. The US applies its liquidity rules only to the largest firms and scales them by size and risk profile through a system known as tailoring. A bank’s category determines whether it faces the full LCR, a reduced version, or none at all, and getting the category right is the starting point for everything else. This article explains the four categories, what each one triggers, and why the framework became the central controversy of March 2023.
What Is the Legal Basis for US Liquidity Tailoring?
The framework traces to the Dodd-Frank Act of 2010, whose section 165 required enhanced prudential standards, including liquidity, for large bank holding companies. The original threshold was 50 billion dollars in assets. In 2018, the EGRRCPA raised that statutory floor to 100 billion dollars, and in 2019 the federal banking agencies issued the tailoring rules that created the current four-category system.
Crucially, categorization is not by size alone. It uses total assets together with four risk indicators: cross-jurisdictional activity, weighted short-term wholesale funding (wSTWF), nonbank assets, and off-balance-sheet exposure. A bank can be pulled into a higher category by any of these indicators, not just by its balance-sheet size, which is how the framework captures riskier profiles that a pure size test would miss.
The Four US Liquidity Categories Explained (I to IV)
The table below summarizes what each category triggers for the three main liquidity requirements: the LCR and NSFR, the FR 2052a reporting frequency, and the Regulation YY internal liquidity stress testing.
| Category | Who (approximately) | LCR / NSFR | FR 2052a | Reg YY stress testing |
|---|---|---|---|---|
| I | US G-SIBs | 100%, daily | Daily | Monthly, full |
| II | ≥ $700bn assets, or ≥ $75bn cross-jurisdictional | 100%, daily | Daily | Monthly, full |
| III | ≥ $250bn assets, or ≥ $100bn with a risk indicator ≥ $75bn | 100% if wSTWF ≥ $75bn, else 85% | Daily if wSTWF ≥ $75bn, else monthly | Monthly, full |
| IV | $100–250bn | 70% if wSTWF ≥ $50bn, else none | Monthly | Quarterly, reduced |
| Below $100bn | Everyone else | None | None | None (SR 10-6 guidance only) |
The pattern is a descending staircase. The largest, most interconnected firms face the full 100% ratios calculated daily and reported daily; mid-sized firms may face a reduced ratio or none, depending on their wSTWF; and banks below 100 billion dollars fall out of the quantitative framework entirely, subject only to the interagency SR 10-6 liquidity guidance.
How Is Liquidity Regulated Differently Across Basel, the EU, the UK, and the US?
Three Things to Know About How US Liquidity Tailoring Works
Three features of the framework are easy to miss and important to get right.
First, the percentages scale the requirement itself. An 85% LCR firm is not doing a lighter, "modified" calculation; it computes its net stressed outflows in full and then applies an 85% factor. A 70% firm applies 0.70. This scaling approach replaced an earlier modified-LCR regime and means the reduced requirement is a genuine, proportionate dialing-down of the same calculation.
Second, requirements bite at two levels. They apply to the holding company, and separately to any depository institution subsidiary of a covered company that has 10 billion dollars or more in assets. There is an important exception: subsidiaries of Category IV firms carry no standalone LCR or NSFR. So a large bank group has to think about its category at both the top and the subsidiary level.
Third, foreign banking organizations are handled through their own lens. An FBO is categorized on its combined US operations, and an intermediate holding company (IHC) is mandatory once its US non-branch assets reach 50 billion dollars. The IHC receives category-based LCR, NSFR, and Reg YY requirements, while US branches of foreign banks carry no LCR but fall under Reg YY liquidity requirements for the combined US operations. The mechanics of the FBO regime are involved enough to warrant separate treatment, but the key point is that foreign banks are not outside the framework; they are brought in through the IHC and combined-operations route.
Why wSTWF Decides a Bank’s Liquidity Requirements
Notice how often weighted short-term wholesale funding appears in the table. It is the indicator that decides, within Category III, whether a firm faces the full 100% LCR and daily reporting or the reduced 85% and monthly reporting, and within Category IV, whether it faces a 70% LCR or none at all. For a mid-sized US bank, its wSTWF level can be the single number that determines how heavy its entire liquidity regime is. It rewards funding yourself with stable retail deposits and penalizes reliance on short-term wholesale money, which is precisely the behavior the framework wants to encourage.
How US Liquidity Tailoring Shaped the Silicon Valley Bank Failure
The tailoring framework is not an academic classification; it is the reason Silicon Valley Bank's failure became a policy crisis. SVB had around 209 billion dollars in assets, which placed it in Category IV, and it sat below the wSTWF trigger. As a result, it had no LCR, no NSFR, and only reduced-frequency internal stress testing. The full standardized liquidity requirements simply did not apply to it.
Whether those requirements would have prevented the failure is genuinely debated, given how fast the run moved relative to the LCR's 30-day horizon. But the fact that a bank of SVB's size and risk profile fell outside the core liquidity rules made the tailoring perimeter itself the central controversy of the post-2023 period, and it is why proposals to lower the thresholds and revisit the categories have been on the table ever since.
Institutions navigating their own category classification, and the LCR, NSFR, and stress-testing obligations that follow from it, can use Mirai ALM & Liquidity to model requirements across multiple scenarios and consolidation levels within a single platform. Learn more here.
Key Takeaways: US Liquidity Tailoring by Category
In the US, the tailoring framework decides which liquidity rules apply before you even reach the rules themselves. Categories I and II face the full 100% LCR and NSFR daily; Category III faces 100% or 85% depending on wSTWF; Category IV faces a 70% ratio or nothing; and banks below 100 billion dollars are outside the quantitative regime. The requirements scale rather than switch to a modified version, bite at both holding-company and large-subsidiary level, and reach foreign banks through the IHC route. SVB sat in Category IV with no LCR at all, which is exactly why the perimeter, not just the rules, is at the center of US reform.
For the full breakdown of the LCR, NSFR, ILAAP, and the reporting frameworks across Basel, the EU, the UK, and the US, read the complete guide "Global Liquidity Risk Regulation: Basel, EU, UK and US Frameworks Compared."
To see how Mirai Regulatory Reporting helps institutions automate LCR, NSFR, ALMM and other liquidity returns from a single data source while keeping every calculation auditable, learn more here.
How Is Liquidity Regulated Differently Across Basel, the EU, the UK, and the US?
