The Texas Banking Collapse Killed Nine of the Ten Largest Banks in the State
In the 1980s an oil price collapse combined with a property bust destroyed almost the entire Texas banking system. Geographic concentration was the reason.
The Scale
During the 1980s the Texas banking system experienced near total failure. Nine of the ten largest bank holding companies in the state failed or required rescue, alongside hundreds of smaller institutions.
That is an extraordinary concentration of failure within one state's banking system during a period when banks elsewhere in the country largely survived.
The Cause
Texas banks had lent heavily into the energy sector during the oil boom of the late 1970s and early 1980s, when prices rose dramatically and drilling activity expanded.
They had also lent heavily into commercial property in Texas cities, which were growing rapidly on the back of energy sector prosperity.
When oil prices collapsed in the mid 1980s, energy loans deteriorated. Simultaneously, property values collapsed, because the demand for offices and housing in Houston and Dallas depended on the energy industry that was contracting.
The banks believed they held two different loan books. They held one exposure to the oil price, expressed in two forms.
The Regulatory Contributor
An important structural factor was that Texas prohibited branch banking and restricted interstate banking, as many states did at the time.
Those restrictions meant Texas banks could not diversify geographically. A bank confined to one state, in an economy dominated by one industry, has no mechanism for reducing correlation regardless of how carefully it underwrites individual loans.
The rules had been intended to protect local banking from consolidation, and their effect was to guarantee that a regional economic shock became a banking crisis.
What It Changed
The episode contributed substantially to the removal of interstate banking restrictions, culminating in federal legislation in 1994 that permitted nationwide banking.
The argument that prevailed was that geographic diversification is a genuine risk management tool, and preventing banks from diversifying makes them more fragile rather than protecting communities.
The counterargument, that consolidation reduces local lending and community relationships, was not baseless and the debate continues.
The Recurring Pattern
The lesson connects directly to more recent failures. Concentration in a single industry produces correlated losses, whether that industry is energy in 1980s Texas, technology in 2023 California, or property in 2000s Ireland and Spain.
The specific analytical question is not how many loans a bank holds but what single variable determines whether they perform. If one answer covers most of the book, the diversification is nominal.
The same question applies on the deposit side, as 2023 demonstrated, and the Texas case is the clearest historical illustration of the asset side version.
The Bottom Line
Texas banks held energy loans and property loans that were both bets on the oil price, and regulation prevented them from diversifying away from it. Ask what single variable your portfolio actually depends on.