Unit of account costs arise because inflation makes money a less reliable what?

• A. A mismeasurement of value due to market volatility.
• B. Higher transaction costs for currency exchange.
• C. Fluctuations in the exchange rate.
• D. Arise from the way inflation makes money a less reliable unit of measurement.

Answer: (D)

The key idea is that money serves as a standard for valuing goods, debts, and contracts—the unit of account. When inflation makes the value of money change over time, that standard becomes less reliable. As a result, prices, wages, and financial statements need to be updated more frequently to reflect real values, and contracts must be renegotiated or indexed to inflation to stay meaningful. This extra effort and potential mispricing are what we call unit of account costs: the costs that arise because money is no longer a stable measuring unit.

The other options miss this core point. Inflation’s effect isn’t primarily about higher costs to exchange currency, fluctuations in exchange rates, or market volatility affecting valuations; it’s about money’s diminished reliability as a consistent unit of measurement, which drives the need to continually adjust prices and accounting.