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Required Rate of Return Calculator

Calculate RRR using the Capital Asset Pricing Model (CAPM)

Risk-Free Rate (%) Typically the 10-year Treasury yield.

Beta (β) Coefficient Stock's volatility vs market (1.0 is market average).

Expected Market Return (%) Historical average of S&P 500 or similar index.

Market Risk Premium: 0.00%

Equity Risk Premium (β adjusted): 0.00%

Required Rate of Return: 0.00%

How to Calculate Required Rate of Return in Excel

The Required Rate of Return (RRR) is the minimum return an investor accepts for owning a company's stock as compensation for a given level of risk associated with holding that stock. The most common method for calculating this is the Capital Asset Pricing Model (CAPM).

The CAPM Formula:
RRR = Risk Free Rate + Beta × (Market Return – Risk Free Rate)

Step-by-Step Excel Calculation

To perform this calculation in Excel, you need three key inputs. Set up your spreadsheet as follows:

Cell	Description	Example Value
A1	Label: Risk-Free Rate	3.5%
A2	Label: Beta	1.25
A3	Label: Expected Market Return	10.0%
A4	Label: Required Rate of Return	Formula Below

The Excel Formula

In cell B4 (next to your "Required Rate of Return" label), enter the following formula:

=B1 + B2 * (B3 – B1)

Understanding the Inputs

Risk-Free Rate (Rf): This is usually the yield on a 10-year US Treasury bond. It represents the return of an investment with zero risk.
Beta (β): A measure of a stock's volatility in relation to the overall market. A beta greater than 1.0 means the stock is more volatile than the market; less than 1.0 means it is less volatile.
Market Return (Rm): The expected return of the market index (like the S&P 500). Historically, this often ranges between 8% and 12%.
Market Risk Premium (Rm – Rf): This is the difference between the expected market return and the risk-free rate. It represents the extra return investors demand for taking on the risk of the stock market.

Example Calculation

If the Risk-Free Rate is 3%, the Beta is 1.5, and the Expected Market Return is 11%, the math works like this:

Calculate Risk Premium: 11% – 3% = 8%
Adjust for Beta: 1.5 × 8% = 12%
Add Risk-Free Rate: 3% + 12% = 15%

In this scenario, an investor would require a 15% return to justify the risk of buying this specific stock.

function calculateRRR() { // 1. Get Input Elements var rfInput = document.getElementById('riskFreeRate'); var betaInput = document.getElementById('betaValue'); var rmInput = document.getElementById('marketReturn'); var resultBox = document.getElementById('resultBox'); // 2. Parse Values (Convert string to float) var rf = parseFloat(rfInput.value); var beta = parseFloat(betaInput.value); var rm = parseFloat(rmInput.value); // 3. Validation if (isNaN(rf) || isNaN(beta) || isNaN(rm)) { alert("Please enter valid numeric values for all fields."); return; } // 4. Calculation Logic (CAPM) // Formula: RRR = Rf + Beta * (Rm – Rf) // Step A: Calculate Market Risk Premium (Rm – Rf) var marketRiskPremium = rm – rf; // Step B: Calculate Equity Risk Premium (Beta * Market Risk Premium) var equityRiskPremium = beta * marketRiskPremium; // Step C: Calculate Final RRR var rrr = rf + equityRiskPremium; // 5. Display Results document.getElementById('riskPremiumResult').innerHTML = marketRiskPremium.toFixed(2) + "%"; document.getElementById('equityPremiumResult').innerHTML = equityRiskPremium.toFixed(2) + "%"; document.getElementById('rrrFinalResult').innerHTML = rrr.toFixed(2) + "%"; // Show result box resultBox.style.display = "block"; }