Calculate Growth Rate of Stock

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Stock Growth Rate Calculator

Calculate Compound Annual Growth Rate (CAGR) and Total Return

Absolute Value Change: $0.00
Total Percentage Return: 0.00%
Compound Annual Growth Rate (CAGR): 0.00%
Investment Multiplier: 1.0x

Understanding Stock Growth Rate

Evaluating the performance of a stock investment requires more than just looking at the profit in dollars. To truly compare investments, particularly those held for different lengths of time, investors rely on growth rate metrics. This calculator provides two essential figures: the Total Return and the Compound Annual Growth Rate (CAGR).

The Difference Between Total Return and CAGR

While both metrics measure growth, they serve different purposes:

  • Total Return (%): This tells you the simple percentage change from your buy price to your sell price. It does not account for the time factor. A 50% return over 1 year is excellent, but a 50% return over 20 years is poor.
  • CAGR (%): The Compound Annual Growth Rate smoothes out the volatility of returns over a period of time. It tells you what annual rate of return you would have needed to achieve the final value from the initial value, assuming the investment compounded annually.

How to Calculate Stock Growth

The math behind stock analysis involves two primary formulas:

1. Total Return Formula

((Final Price – Initial Price) / Initial Price) × 100

2. CAGR Formula

( (Final Price / Initial Price) ^ (1 / Number of Years) ) – 1

Example Calculation

Imagine you bought a stock for $50.00 and held it for 3 years. Today, the stock is trading at $85.00.

  • Absolute Gain: $85 – $50 = $35 profit.
  • Total Return: ($35 / $50) × 100 = 70%.
  • CAGR: (($85 / $50)^(1/3)) – 1 = 19.35% per year.

This means your money effectively grew at a steady rate of 19.35% every year for three years to reach that final amount.

function calculateStockGrowth() { // 1. Get input values var initPriceStr = document.getElementById("initialPrice").value; var finalPriceStr = document.getElementById("finalPrice").value; var yearsStr = document.getElementById("yearsHeld").value; // 2. Parse values to floats var initPrice = parseFloat(initPriceStr); var finalPrice = parseFloat(finalPriceStr); var years = parseFloat(yearsStr); // 3. Validation if (isNaN(initPrice) || isNaN(finalPrice) || isNaN(years)) { alert("Please enter valid numbers for all fields."); return; } if (initPrice <= 0) { alert("Initial Price must be greater than zero."); return; } if (years <= 0) { alert("Duration must be greater than zero to calculate annual growth."); return; } // 4. Calculations // Absolute Change (Profit/Loss in $) var absChange = finalPrice – initPrice; // Total Return Percentage var totalReturn = (absChange / initPrice) * 100; // Multiplier (e.g., 2x, 1.5x) var multiplier = finalPrice / initPrice; // CAGR Calculation: (Ending / Beginning) ^ (1 / n) – 1 // Note: CAGR can handle negative returns (final = 0) { absElem.className = "result-value positive-growth"; absElem.innerHTML = "+" + absElem.innerHTML; } else { absElem.className = "result-value negative-growth"; } // Set Total Return var totalElem = document.getElementById("totalReturn"); totalElem.innerHTML = totalReturn.toFixed(2) + "%"; totalElem.className = totalReturn >= 0 ? "result-value positive-growth" : "result-value negative-growth"; // Set CAGR var cagrElem = document.getElementById("cagrResult"); cagrElem.innerHTML = cagr.toFixed(2) + "%"; cagrElem.className = cagr >= 0 ? "result-value positive-growth" : "result-value negative-growth"; // Set Multiplier document.getElementById("multiplierResult").innerHTML = multiplier.toFixed(2) + "x"; }

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