The Savings and Loan Crisis Was Caused by a Rule Change
More than a thousand American thrifts failed across the 1980s and early 1990s. The root cause was an interest rate mismatch, and deregulation turned a solvency problem into a gambling problem.
The Original Business
Savings and loan associations, known as thrifts, had a narrow purpose. They took deposits from local savers and made long term fixed rate mortgages to local borrowers. Regulation capped the interest they could pay on deposits and restricted what they could invest in.
The model was profitable in a stable rate environment. Borrow short at a low regulated rate, lend long at a higher rate, and earn the spread.
What Broke It
The vulnerability is a textbook duration mismatch. Assets were thirty year fixed rate mortgages. Liabilities were deposits that could leave at any time.
When inflation and interest rates rose sharply through the late 1970s and early 1980s, two things happened simultaneously. The market value of those old low rate mortgages collapsed, because a mortgage yielding a few percent is worth far less when new loans yield double digits. And depositors withdrew money to chase higher yields available in money market funds, which were not subject to the same rate caps.
The industry was economically insolvent before anyone committed fraud. Rising rates destroyed the value of the assets while the liabilities kept their face value.
The Response That Made It Worse
Rather than resolve insolvent institutions, policymakers loosened the rules, in the hope that thrifts could grow out of the problem. Deposit rate caps were phased out and thrifts were permitted to invest in commercial real estate, development projects, and other assets far outside their traditional business.
Accounting standards for the industry were also relaxed, allowing institutions to appear solvent on paper when they were not.
The result is a case study in moral hazard. An institution with no remaining equity has almost nothing left to lose. Deposits were federally insured, so depositors did not demand higher rates for higher risk. Owners faced a one sided bet: a large gamble that succeeded would restore the institution, and one that failed cost them little because the equity was already gone.
The Predictable Consequence
Insolvent thrifts, newly permitted to invest in speculative development and funded with insured deposits they could attract by offering high rates, grew rapidly into risky assets. Some institutions expanded their balance sheets enormously in a few years.
Fraud followed, and prosecutions followed that, but the fraud was a symptom. The structure had made reckless behavior the rational strategy for anyone controlling an insolvent institution.
The eventual cleanup required a federal agency to dispose of the assets of hundreds of failed institutions, and the cost to taxpayers ran well over a hundred billion dollars.
The Enduring Lessons
Three lessons carried forward. Duration mismatch is a genuine solvency risk and not merely an earnings issue, a lesson relearned in 2023 when banks holding long dated securities faced the same arithmetic.
Second, forbearance is expensive. Allowing insolvent institutions to continue operating in the hope of recovery reliably increases the eventual cost, because the institution takes greater risks in the interim.
Third, insured deposits combined with weak capital requirements create a subsidy for risk taking, which is why capital requirements exist and why they are enforced most strictly on institutions with insured funding.
The Bottom Line
Rising rates made the thrift model insolvent, and deregulating insolvent institutions funded by insured deposits turned a balance sheet problem into a gambling one. Forbearance did not save money, it multiplied the bill.