The fragility of our financial buffers will only be revealed when they fail in the next crisis.
While buffer has a specific meaning in chemistry, I am using the word in the broad sense of a reserve resource that absorbs the initial destructive impacts of crises or system overloads. Marshland along a sea coast is a buffer against destructive storm waves, for example.
A savings account acts as a buffer against financial drawdowns or losses of income that would otherwise quickly cascade into a full-blown crisis.
Redundancy of resources can act as a buffer. If an airline maintains an aircraft in reserve, this reserve plane acts as a buffer against the disruption to the airline’s scheduled flights should one of its aircraft be unexpectedly removed from service by a mechanical failure. The reserve aircraft can replace the plane that was withdrawn from service with minimal disruption.
Stockpiles act as buffers against supply disruptions. A storage tank of oil buffers a refinery against any delay in its incoming shipments of crude oil. Supplies of food and water buffer against severe natural disasters that disrupt regional water service and food deliveries.
Credit can act as a financial buffer against unexpectedly high expenses or declines in revenue. If a tire on our vehicle goes flat during a road trip and we only have a few dollars cash, a credit card buffers the disruption by funding the replacement tire and labor.
But over-using credit can end up thinning our financial buffers. If someone starts using their credit card not as an emergency buffer but to augment their cash income–in effect, acting as if the borrowed money was a pay raise rather than a loan–their credit line diminishes to near-zero and when they actually need credit for an emergency, it’s no longer available.
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