Simplifying Assumption: Security of Stored Wealth

Evaluating a Financial Model's Prediction

An economic model is used to project the outcome of a financial decision. The model concludes that if an individual lends $1,000 to a new business venture at a 10% annual interest rate, the lender is guaranteed to have exactly $1,100 at the end of the year. For this conclusion to be correct, what crucial simplifying assumption must the model be making?

A financial model that assumes a borrower will always repay a loan in full is more likely to produce an accurate forecast for a government-issued bond than for a loan to a new, unproven startup company.

Consequences of a Simplified Economic Model

The Utility of Simplified Economic Models

An economist is building a simple model to analyze an individual's decisions about saving, borrowing, and investing over time. To make the model work, several real-world uncertainties must be ignored. Match each real-world scenario below with the specific simplifying assumption the model would be making to disregard that scenario.

When a financial model assumes a 100% certainty of loan repayment, its calculation of the lender's final profit is effectively treating the interest rate as a pure measure of the time value of money, completely excluding any premium for ________.

An individual is using a basic financial model to decide how to lend out their savings for one year. The model operates on the core assumption that any loan will be repaid in full with a known, guaranteed interest rate. Arrange the following steps in the logical order the individual would follow to make a decision according to this simplified model.

Investment Strategy Critique

An economic model is designed to analyze an individual's saving and lending decisions. A core feature of this model is that it does not account for any possibility of default on loans or any variation in the returns from an investment. Which of the following financial situations would be most accurately represented by this model?