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The central question for an investment project is whether its future return, $X$, is sufficiently high to justify both the initial cost, $I$, and the waiting period. Answering this requires exploring alternative uses for the funds to determine if another option would leave the company in a better financial position. This process of comparing the project against the next best alternative is how the project's opportunity cost is determined.

The Core Investment Question

When a firm evaluates an investment project, the benchmark for comparison is the next best alternative use of the funds. Assuming the project under consideration is the best one available, the standard alternative is to invest the money in financial markets, which offer a guaranteed real interest rate, $r$, on risk-free assets.

Benchmark for Investment Decisions: Financial Markets

Analyze the following investment scenario and determine the best course of action for the business. Justify your answer based on the core principle of investment evaluation.

Bakery's Investment Dilemma

A company should always proceed with a one-year investment project if the expected future revenue from the project is greater than its initial cost.

A company is evaluating a project that costs $100,000 today and is guaranteed to pay back $105,000 in one year. A manager argues, 'Since the payback is more than the cost, we should obviously do it.' Analyze this manager's reasoning. Is it complete? If not, what critical element is missing from their evaluation and why is it important?

Evaluating a Simple Investment

A business owner is evaluating a one-year project that costs $100,000 today and is guaranteed to generate a revenue of $102,000 in one year. The owner concludes, 'Since the revenue of $102,000 is greater than the cost of $100,000, this project is profitable and we should proceed.' Analyze the business owner's reasoning. Explain why this simple comparison is an insufficient basis for making a sound investment decision, and identify the crucial element missing from their evaluation.

The Flaw in a Simple Profit Calculation

A manufacturing firm is considering a project to upgrade its machinery. The upgrade costs $500,000 today and is guaranteed to generate an additional $520,000 in revenue exactly one year from now. In order to make a sound decision about whether to proceed, which of the following pieces of information is most essential for the firm's managers to consider?

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