FRM Exam Part I · Learning From Financial Disasters

Savings and Loan Crisis and Orange County Explained

Updated 11 October 2026 · Fact-checked

The S&L crisis and Orange County are FRM case studies in interest rate risk. S&Ls funded long fixed-rate mortgages with short-term deposits, so rising rates crushed them. Orange County used reverse repos to lever a bond portfolio, which lost value when rates rose. Know the mechanism, the lessons and the numbers.

Understand Interest Rate Risk: Savings and Loan Crisis and Orange County

Interest rate risk is the risk that a change in rates reduces the value or income of a balance sheet. It is largest when assets and liabilities have different maturities or rate sensitivities. This is called maturity mismatch or a duration gap.

US savings and loan institutions (S&Ls, or thrifts) took short-term deposits and made long-term fixed-rate mortgages. In the 1960s and 70s this worked while short rates stayed low. When rates rose sharply in the late 1970s and early 1980s, deposit costs jumped but mortgage income stayed fixed. Margins turned negative. The market value of the old mortgages also fell, so many thrifts were insolvent in economic terms.

Regulation made things worse. Deposit rate ceilings (Regulation Q) pushed depositors to money market funds, so thrifts lost funding. Regulators then loosened rules and raised deposit insurance limits. Insured depositors did not care about the thrift's risk, so this created moral hazard. Weak thrifts gambled for resurrection with risky real estate and junk bonds. Forbearance, meaning regulators delaying closure of insolvent thrifts, increased the final cost to taxpayers.

Orange County, California, is the second case. Treasurer Robert Citron ran an investment pool for the county and local agencies. He borrowed through reverse repos, posting the pool's securities as collateral, and bought more securities, often structured notes whose values were inversely tied to rates. The pool held about USD 7.5 billion of investors' deposits, which acted as its equity base, and borrowed roughly USD 12.5 billion through reverse repos to hold about USD 20 billion of securities. Assets were therefore about 2.7 times equity (borrowing about 1.7 times equity). This worked while short rates were low and the curve was steep. In 1994 the Fed raised rates. Bond values fell, structured notes lost more than normal bonds, and funding costs rose. The reported loss was about USD 1.6 billion, roughly 21% of the USD 7.5 billion base. Lenders demanded more collateral, and the county filed for bankruptcy in December 1994.

The worked example below uses a simple, stylised duration estimate (duration 3, a 2% rise in yields). Its result differs from the reported loss of about USD 1.6 billion. Use it to practise the method, not to reproduce the actual figure.

The lessons are the same: measure the interest rate exposure of the whole balance sheet, do not rely on one rate view, limit leverage, understand complex instruments, and have independent oversight. Citron was a single decision maker with weak controls, and investors in the pool did not question the strategy because returns were high. Citron later pleaded guilty to misleading investors, so misrepresentation was an aggravating factor. The primary cause of the losses was still interest rate risk magnified by leverage.

Key formulas to remember

Net interest margin: Net interest margin = Interest income − Interest expense; For a thrift, this turns negative when funding costs reset above fixed asset yields.
Price change from duration: ΔP ≈ −D × Δy × P; D is modified duration. Use for small rate moves. A higher duration or higher leverage means larger losses.
Duration gap (approximate): Duration gap = D(assets) − (L ÷ A) × D(liabilities); A positive gap means equity loses value when rates rise. L ÷ A is liabilities over assets.
Leverage ratio: Leverage = Total assets ÷ Equity; Leverage multiplies the loss on equity: loss on equity ≈ leverage × loss on assets.
Reverse repo economics (as used by Orange County): Net carry = Yield on securities bought − Repo rate paid; The strategy earns carry while short rates are low. It loses when the repo rate rises above the yield.

How to solve Interest Rate Risk: Savings and Loan Crisis and Orange County questions

Use this method for any question on these two cases, whether it is conceptual or numerical.

1Identify the institution: S&L (thrift) or Orange County. Recall its funding and its assets.
2Find the mismatch: short-term liabilities against long-term fixed assets, or a levered bond portfolio against repo funding.
3Name the rate move: rates rose (late 1970s to early 1980s for S&Ls; 1994 for Orange County).
4Trace the effect on both income (funding cost up) and value (bond prices down).
5If numbers are given, apply ΔP ≈ −D × Δy × P and then scale by leverage to get the effect on equity.
6Add the amplifiers: moral hazard and deposit insurance for S&Ls; leverage, structured notes and weak oversight for Orange County.
7Match to the lesson in the options: gap management, leverage limits, independent risk control, product understanding.
8Check each option for words that overstate, such as 'always' or 'only'.

Quickest way: Two-case recall grid

When to use it: Use for conceptual multiple-choice questions where you must pick the cause or lesson in under a minute.

S&L: short deposits, long fixed mortgages, rates up, negative margin, then deregulation and moral hazard.
Orange County: reverse repo leverage, structured notes, rates up in 1994, collateral calls, bankruptcy.
Treat interest rate risk, amplified by leverage and moral hazard, as the core cause. Credit losses and fraud were secondary or aggravating factors, not the primary cause, so be wary of options that name them as the main cause.
For numbers, compute asset loss first, then multiply by leverage for the equity loss.

Common mistakes in Interest Rate Risk: Savings and Loan Crisis and Orange County

Saying the S&L crisis was caused by falling interest rates.
Students link any rate move to losses without checking direction.
Fix: S&Ls lost because rates rose. Funding costs went up while mortgage yields were fixed.
Treating the S&L crisis as only a market risk problem.
The maturity mismatch is memorized but regulation is forgotten.
Fix: Add deposit insurance, moral hazard and regulatory forbearance. They raised the final cost.
Describing Orange County as a fraud or a derivative trading loss alone.
Headlines called it a derivatives disaster.
Fix: The main driver was leverage through reverse repos in a bond portfolio exposed to rising rates. Structured notes made losses larger. Citron later pleaded guilty to misleading investors, so misrepresentation was an aggravating factor, but it was not the primary cause of the losses.
Forgetting that leverage multiplies the loss on equity.
Students compute only the percent fall in the asset portfolio.
Fix: Equity loss ≈ leverage × asset loss. Compute the asset loss, then multiply.
Using the wrong sign in the duration formula.
The negative sign in −D × Δy is dropped.
Fix: When yields rise, prices fall. Write the sign and check that the answer makes sense.
Claiming Orange County lost money because the bonds defaulted.
Confusing credit risk with interest rate risk.
Fix: Much of the portfolio was of high credit quality. Losses were mainly mark-to-market from rate rises and forced collateral calls, not defaults.

Worked examples

Example 1

A thrift has ₹1,000 crore of assets in fixed-rate mortgages with modified duration 6, funded by ₹950 crore of deposits with modified duration 0.5 and ₹50 crore of equity. Yields rise by 2% (200 bp). Estimate the change in equity value using duration.

Show the solution

Asset change = −D × Δy × A = −6 × 0.02 × 1,000 = −₹120 crore.
Liability change = −0.5 × 0.02 × 950 = −₹9.5 crore (liabilities fall in value).
Change in equity = −120 − (−9.5) = −₹110.5 crore.
Equity was ₹50 crore, so the thrift is economically insolvent.

Answer: Equity falls by about ₹110.5 crore, more than its ₹50 crore, so the thrift is insolvent in economic terms.

Example 2

This is a stylised estimate, not the actual Orange County result. A county pool has USD 7.5 billion of equity and borrows USD 12.5 billion through reverse repos, investing all in securities with an assumed modified duration of 3. Yields rise by 2%. Estimate the loss on the securities and the percent loss on equity.

Show the solution

Total securities = 7.5 + 12.5 = USD 20 billion.
Loss on securities ≈ 3 × 0.02 × 20 = USD 1.2 billion.
Loss as a percent of equity = 1.2 ÷ 7.5 = 16%.
Leverage is 20 ÷ 7.5 = 2.67. Asset loss is 6%, and 6% × 2.67 = 16%, which agrees.
The reported actual loss was about USD 1.6 billion (about 21% of 7.5 billion). The gap arises because the assumed duration and yield rise are simplifications; structured notes and other features made the real portfolio more sensitive.

Answer: Under these stylised assumptions the securities lose about USD 1.2 billion, which is 16% of equity. This differs from the reported loss of about USD 1.6 billion.

Exam tips

Expect conceptual questions on cause and lesson. Pick the interest rate risk and leverage answer, not credit or fraud.
Remember the direction: rates rose in both cases.
For S&L questions, look for moral hazard and regulatory forbearance as aggravating factors.
For Orange County, link leverage, reverse repos and structured notes, and weak oversight by one decision maker.
In numerical items, use the duration approximation, then scale by leverage. Use a calculator only for the arithmetic.

Practice questions from Learning From Financial Disasters

Interest Rate Risk: Savings and Loan Crisis and Orange County: frequently asked questions

How did interest rate risk cause the S&L crisis?

Thrifts funded long-term fixed-rate mortgages with short-term deposits. When rates rose, deposit costs reset higher while mortgage income stayed fixed. Margins turned negative and asset values fell below liabilities.

What did Robert Citron do in Orange County?

He ran the county investment pool and used reverse repos to borrow against its securities, then bought more securities, including structured notes. The strategy bet that rates would stay low. When rates rose in 1994, the pool lost heavily.

Was Orange County a credit loss?

No. The main cause was interest rate risk amplified by leverage. Bond prices fell as rates rose, and lenders demanded more collateral, which forced losses to be realized.

What are the main lessons for risk managers?

Measure the duration gap on the whole balance sheet, limit leverage, understand complex instruments, and keep independent oversight. Also watch incentives, such as deposit insurance creating moral hazard.