When they became lending institutions, their earliest rule was to keep almost 100% of cash reserves against their loans, so that they would not be caught short if most of their depositors decided to withdraw their money at the same time.
Cuando pasaron a ser entidades crediticias, su norma más antigua consistía en mantener reservas líquidas de casi el 100 por ciento correspondientes a sus préstamos, para no verse sin fondos, si la mayoría de sus depositantes decidían retirar su dinero al mismo tiempo.