JEPI Calculator: Estimate Your Yield and Total Return
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f8f9fa;
color: #333;
line-height: 1.6;
margin: 0;
padding: 0;
}
.container {
max-width: 960px;
margin: 20px auto;
padding: 20px;
background-color: #ffffff;
border-radius: 8px;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
display: flex;
flex-direction: column;
align-items: center;
}
header {
width: 100%;
background-color: #004a99;
color: white;
padding: 20px 0;
text-align: center;
border-radius: 8px 8px 0 0;
margin-bottom: 20px;
}
header h1 {
margin: 0;
font-size: 2.5em;
font-weight: 600;
}
.loan-calc-container {
width: 100%;
margin-bottom: 30px;
padding: 25px;
border: 1px solid #dee2e6;
border-radius: 8px;
background-color: #fdfdfd;
}
.loan-calc-container h2 {
text-align: center;
color: #004a99;
margin-top: 0;
margin-bottom: 25px;
font-size: 1.8em;
}
.input-group {
margin-bottom: 20px;
width: 100%;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #555;
}
.input-group input[type="number"],
.input-group input[type="text"],
.input-group select {
width: calc(100% – 22px); /* Account for padding and border */
padding: 12px;
border: 1px solid #ccc;
border-radius: 5px;
font-size: 1em;
box-sizing: border-box;
transition: border-color 0.2s ease-in-out;
}
.input-group input:focus,
.input-group select:focus {
border-color: #004a99;
outline: none;
}
.input-group .helper-text {
font-size: 0.85em;
color: #777;
margin-top: 5px;
display: block;
}
.input-group .error-message {
color: #dc3545;
font-size: 0.85em;
margin-top: 5px;
height: 1.2em; /* Reserve space */
}
button {
background-color: #004a99;
color: white;
border: none;
padding: 12px 25px;
border-radius: 5px;
cursor: pointer;
font-size: 1.1em;
margin: 5px;
transition: background-color 0.2s ease-in-out, transform 0.1s ease;
}
button:hover {
background-color: #003b7a;
transform: translateY(-1px);
}
button.secondary {
background-color: #6c757d;
}
button.secondary:hover {
background-color: #5a6268;
}
button:active {
transform: translateY(0);
}
#results {
width: 100%;
margin-top: 30px;
padding: 25px;
border: 1px solid #dee2e6;
border-radius: 8px;
background-color: #e9ecef;
text-align: center;
}
#results h3 {
color: #004a99;
margin-top: 0;
margin-bottom: 20px;
font-size: 1.6em;
}
.primary-result {
font-size: 2.2em;
font-weight: bold;
color: #004a99;
background-color: #ffffcc;
padding: 15px 20px;
border-radius: 8px;
margin-bottom: 20px;
display: inline-block;
min-width: 250px;
}
.result-item {
margin-bottom: 15px;
font-size: 1.1em;
}
.result-item strong {
color: #004a99;
}
.chart-container, .table-container {
width: 100%;
margin-top: 30px;
padding: 25px;
border: 1px solid #dee2e6;
border-radius: 8px;
background-color: #ffffff;
}
.chart-container h3, .table-container h3 {
text-align: center;
color: #004a99;
margin-top: 0;
margin-bottom: 25px;
font-size: 1.6em;
}
canvas {
display: block;
margin: 0 auto;
max-width: 100%;
}
table {
width: 100%;
border-collapse: collapse;
margin-top: 15px;
}
th, td {
padding: 12px;
text-align: left;
border-bottom: 1px solid #ddd;
}
th {
background-color: #004a99;
color: white;
font-weight: bold;
}
tr:nth-child(even) {
background-color: #f2f2f2;
}
tr:hover {
background-color: #e9ecef;
}
.formula-explanation {
margin-top: 20px;
font-size: 0.95em;
color: #555;
text-align: center;
padding: 10px;
background-color: #eef;
border-left: 4px solid #004a99;
}
article {
margin-top: 40px;
width: 100%;
padding: 25px;
background-color: #ffffff;
border-radius: 8px;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
article h2 {
color: #004a99;
border-bottom: 2px solid #004a99;
padding-bottom: 8px;
margin-top: 30px;
margin-bottom: 20px;
font-size: 2em;
}
article h3 {
color: #004a99;
margin-top: 25px;
margin-bottom: 15px;
font-size: 1.6em;
}
article p, article ul, article ol {
margin-bottom: 15px;
}
article li {
margin-bottom: 8px;
}
a {
color: #007bff;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
.internal-links-section ul {
list-style: none;
padding: 0;
}
.internal-links-section li {
margin-bottom: 12px;
}
.internal-links-section a {
font-weight: bold;
}
.internal-links-section p {
font-style: italic;
color: #666;
margin-top: 5px;
}
.tooltip {
position: relative;
display: inline-block;
border-bottom: 1px dotted #004a99;
cursor: help;
}
.tooltip .tooltiptext {
visibility: hidden;
width: 250px;
background-color: #333;
color: #fff;
text-align: center;
border-radius: 6px;
padding: 5px 10px;
position: absolute;
z-index: 1;
bottom: 125%;
left: 50%;
margin-left: -125px;
opacity: 0;
transition: opacity 0.3s;
font-size: 0.85em;
line-height: 1.3;
}
.tooltip .tooltiptext::after {
content: "";
position: absolute;
top: 100%;
left: 50%;
margin-left: -5px;
border-width: 5px;
border-style: solid;
border-color: #333 transparent transparent #33;
}
.tooltip:hover .tooltiptext {
visibility: visible;
opacity: 1;
}
@media (max-width: 768px) {
.container {
margin: 10px;
padding: 15px;
}
header h1 {
font-size: 1.8em;
}
button {
width: 100%;
margin: 5px 0;
}
.input-group input, .input-group select {
width: calc(100% – 14px);
}
.primary-result {
font-size: 1.8em;
min-width: unset;
}
canvas {
height: 300px; /* Adjust canvas height for smaller screens */
}
}
JEPI Performance Estimator
Your Estimated JEPI Performance
$0.00
Total Dividends Received: $0.00
Total Capital Appreciation: $0.00
Ending NAV (per share equivalent): $0.00
Assumptions: Based on an initial investment of $0.00 over 0 years, with average annual dividends of 0%, capital appreciation of 0%, and reinvestment set to N/A.
Formula Used: This calculator projects future value by compounding capital appreciation and dividends (if reinvested) annually, while accounting for the ETF's expense ratio. The ending NAV represents the estimated value of each initial "share equivalent" after accounting for growth, dividends, and fees.
Annual Performance Breakdown
Table Explanation: This table shows a year-by-year projection of your investment's performance, detailing how dividends, capital gains, and fees contribute to the growth of your Net Asset Value (NAV).
Investment Growth Over Time
Chart Explanation: This chart visually represents the growth of your investment over the specified horizon, comparing the total value (including reinvested dividends) against just capital appreciation.
What is a JEPI Calculator?
A JEPI calculator is a financial tool designed to estimate the potential performance of an investment in the JPMorgan Equity Premium Income ETF (JEPI). It helps investors forecast future returns by considering key factors such as the initial investment amount, expected dividend yields, anticipated capital appreciation, investment duration, and the ETF's expense ratio. By inputting these variables, users can gain a clearer understanding of how their investment might grow over time, with or without dividend reinvestment.
Who Should Use It:
- Income-Focused Investors: Individuals seeking a steady stream of income from their investments will find a JEPI calculator particularly useful for projecting dividend payouts.
- Long-Term Investors: Those planning to hold their investment for several years can use the calculator to visualize potential long-term growth and wealth accumulation.
- Risk-Aware Investors: Investors considering JEPI for its potential to offer income while moderating volatility can use the calculator to understand how its components (dividends and capital appreciation) might contribute to total returns under different scenarios.
- Portfolio Diversifiers: Investors looking to add an income-generating and potentially lower-volatility component to a broader portfolio can use the calculator to assess JEPI's expected contribution.
Common Misconceptions About JEPI Calculators:
- Guaranteed Returns: A JEPI calculator provides *estimates*, not guarantees. Past performance and future projections are subject to market fluctuations and economic conditions. The calculator does not predict exact future values.
- Ignoring Fees: Some basic calculators might overlook the impact of the expense ratio. A comprehensive JEPI calculator, like the one provided here, factors in these annual costs, which can subtly erode returns over time.
- Static Projections: Market conditions, dividend payouts, and underlying asset performance are dynamic. A JEPI calculator typically uses average or assumed rates, and actual results can vary significantly year to year.
- Tax Implications: Calculators usually don't factor in taxes on dividends or capital gains, which can significantly impact an investor's net take-home return.
JEPI Calculator Formula and Mathematical Explanation
The core of a JEPI calculator involves projecting the future value of an investment by simulating annual growth, considering both capital appreciation and dividend distributions. It also accounts for the ETF's expense ratio and the option to reinvest dividends.
Variables and Calculation Steps:
Let's define the variables used:
| Variable |
Meaning |
Unit |
Typical Range |
| $I_0$ |
Initial Investment |
USD ($) |
$1,000 – $1,000,000+ |
| $D_a$ |
Average Annual Dividend Yield |
Percentage (%) |
6.0% – 10.0% |
| $C_a$ |
Average Annual Capital Appreciation Rate |
Percentage (%) |
-5.0% – 15.0% |
| $Y$ |
Investment Horizon |
Years |
1 – 30 |
| $R$ |
Dividend Reinvestment (Yes/No) |
Boolean |
Yes / No |
| $E$ |
Expense Ratio |
Percentage (%) |
0.30% – 0.50% |
Mathematical Derivation:
The calculation proceeds year by year. For each year ($t$ from 1 to $Y$):
- Beginning Value ($V_{t-1}$): This is the value of the investment at the start of the year. For year 1, $V_0 = I_0$.
- Gross Dividend Amount: $Div_{gross} = V_{t-1} \times (D_a / 100)$
- Capital Appreciation Amount: $CapApp = V_{t-1} \times (C_a / 100)$
- Total Growth Before Fees: $Growth_{gross} = Div_{gross} + CapApp$
- Fees Based on Current Value: $Fees_t = V_{t-1} \times (E / 100)$
- Net Growth: $Growth_{net} = Growth_{gross} – Fees_t$
- Value Before Dividend Reinvestment: $V_{temp} = V_{t-1} + Growth_{net}$
- Dividend Reinvestment Adjustment:
- If $R$ is "Yes": The entire $Div_{gross}$ is reinvested, meaning the total value grows. The ending value includes both the capital appreciation and the gross dividends, minus fees. $V_t = V_{t-1} + (V_{t-1} \times (C_a / 100)) + (V_{t-1} \times (D_a / 100)) – (V_{t-1} \times (E / 100))$
- If $R$ is "No": Dividends are paid out and not added back to the principal for growth calculation. The growth is only from capital appreciation, minus fees. The total dividends received are tracked separately. $V_t = V_{t-1} + (V_{t-1} \times (C_a / 100)) – (V_{t-1} \times (E / 100))$
- Total Dividends Received ($TotalDiv$): If $R$ is "No", $TotalDiv$ accumulates $Div_{gross}$ each year. If $R$ is "Yes", $TotalDiv$ accumulates $Div_{gross}$ each year, representing the gross amount *before* reinvestment.
- Total Capital Appreciation ($TotalCapApp$): Accumulates $CapApp$ each year.
Simplified Annual Calculation (Reinvesting Dividends):
$V_t = V_{t-1} \times (1 + (D_a / 100) + (C_a / 100) – (E / 100))$
This formula compounds the net annual return (dividends + capital appreciation – fees) onto the previous year's value.
Total Return ($TR$):
$TR = V_Y – I_0$
Ending NAV (per share equivalent): This is typically represented by the final calculated value $V_Y$, assuming the initial investment of $1 was used to represent a per-share value, or scaled appropriately.
Practical Examples (Real-World Use Cases)
Example 1: Income Generation Focus
Scenario: An investor puts $50,000 into JEPI, aiming for income. They do not plan to reinvest dividends and hold for 5 years. They expect an average 8% annual dividend yield and 4% annual capital appreciation, with a 0.35% expense ratio.
- Inputs: Initial Investment = $50,000, Annual Dividends = 8%, Capital Appreciation = 4%, Horizon = 5 Years, Reinvest = No, Expense Ratio = 0.35%
- Calculation:
- Year 1: Beg NAV=$50,000. Div=$4,000. CapApp=$2,000. Fees=$175. Ending NAV=$51,825. Total Div Received=$4,000.
- Year 2: Beg NAV=$51,825. Div=$4,146. CapApp=$2,073. Fees=$181. Ending NAV=$57,853. Total Div Received=$4,000 + $4,146 = $8,146.
- … (continues for 5 years)
- Outputs (Approximate):
- Total Dividends Received: ~$22,470
- Total Capital Appreciation: ~$12,415
- Fees Paid: ~$900
- Ending Investment Value: ~$61,115
- Total Return: ~$11,115
- Interpretation: In this scenario, the investor received significant income (~$22k) while their principal grew modestly (~$11k) after fees. This highlights JEPI's suitability for income seekers where capital growth is secondary.
Example 2: Growth and Income Focus with Reinvestment
Scenario: A younger investor puts $20,000 into JEPI, planning to reinvest dividends for long-term growth. They anticipate a 7% annual dividend yield and 6% annual capital appreciation over 15 years, with a 0.35% expense ratio.
- Inputs: Initial Investment = $20,000, Annual Dividends = 7%, Capital Appreciation = 6%, Horizon = 15 Years, Reinvest = Yes, Expense Ratio = 0.35%
- Calculation:
- Year 1: Beg NAV=$20,000. Net Annual Return Rate = 7% + 6% – 0.35% = 12.65%. Ending NAV = $20,000 * (1 + 0.1265) = $22,530.
- Year 2: Beg NAV=$22,530. Ending NAV = $22,530 * (1.1265) = $25,371.
- … (compounds annually for 15 years)
- Outputs (Approximate):
- Total Dividends (Gross before reinvestment): ~$25,500
- Total Capital Appreciation: ~$29,000
- Fees Paid: ~$2,300
- Ending Investment Value: ~$70,950
- Total Return: ~$50,950
- Interpretation: By reinvesting dividends, the investor leverages the power of compounding. Even with fees, the combination of capital appreciation and reinvested dividends leads to a substantial increase in the total investment value over the long term, demonstrating JEPI's potential for balanced growth and income accumulation.
How to Use This JEPI Calculator
- Enter Initial Investment: Input the total dollar amount you plan to invest in JEPI.
- Input Expected Dividend Yield: Provide the estimated annual dividend yield as a percentage (e.g., 7.5%). This is crucial for income projections.
- Input Expected Capital Appreciation: Enter the anticipated annual percentage growth of JEPI's Net Asset Value (NAV), excluding dividends. This reflects market performance.
- Set Investment Horizon: Specify the number of years you intend to hold the investment.
- Choose Dividend Reinvestment: Select "Yes" if you want dividends to be reinvested to compound your returns, or "No" if you prefer to receive them as cash.
- Enter Expense Ratio: Input JEPI's current expense ratio (usually around 0.35%). This fee impacts net returns.
- Click "Calculate": The calculator will process your inputs.
How to Read Results:
- Primary Result (Total Return): This is the total estimated profit or loss on your investment over the chosen horizon, combining capital gains and dividends (less fees).
- Total Dividends Received: The sum of all dividend payments expected during the investment period. Higher if reinvestment is off.
- Total Capital Appreciation: The total increase in the underlying value of your investment, separate from dividends.
- Ending NAV: The projected value of your investment at the end of the horizon.
- Annual Performance Table: Provides a year-by-year breakdown, showing how each component (dividends, appreciation, fees) affects the NAV.
- Chart: Offers a visual comparison of total growth versus capital appreciation over time.
Decision-Making Guidance:
Use the calculator to compare different scenarios (e.g., varying dividend yields, horizons, or reinvestment options). If your primary goal is income, ensure the "Total Dividends Received" aligns with your needs. If long-term wealth accumulation is key, observe the "Total Return" and "Ending NAV" with dividend reinvestment enabled. Remember that these are projections; consult with a financial advisor for personalized advice.
Key Factors That Affect JEPI Results
- Market Volatility: JEPI's performance is tied to the broader equity market. High volatility can lead to larger fluctuations in both capital appreciation and dividend payouts (as option premiums might change). Even with its income focus, significant market downturns can negatively impact its NAV.
- Equity Market Performance ($C_a$): The core driver of JEPI's capital appreciation component is the performance of the underlying equity portfolio. A strong bull market generally leads to higher capital appreciation, while a bear market can result in losses.
- Interest Rate Environment: JEPI utilizes option writing strategies (selling call options). Higher interest rates can sometimes influence volatility and option premium levels, indirectly affecting JEPI's income generation and potentially its NAV. Lower rates might decrease the attractiveness of some income alternatives, potentially increasing demand for JEPI.
- Dividend Payout Strategy & Option Premiums ($D_a$): JEPI aims to generate income through a combination of equity dividends and premiums from selling call options. The actual dividend payout is influenced by the performance of the underlying stocks and the success of the option-selling strategy. Market conditions affect the premiums captured.
- Expense Ratio ($E$): The annual management fee (0.35% for JEPI) directly reduces the ETF's net returns. While seemingly small, this fee compounds over time and lowers the overall yield and growth compared to a zero-fee alternative.
- Inflation: High inflation can erode the purchasing power of both dividends and capital gains. While JEPI aims to provide income, the real return (after accounting for inflation) is what ultimately matters for maintaining or increasing one's standard of living.
- Taxation: Dividends and capital gains distributions from ETFs are typically taxable events in the year they are received (unless held in a tax-advantaged account like an IRA or 401k). Taxes reduce the net amount an investor keeps, impacting the effective total return.
- Investment Horizon ($Y$): The longer the investment horizon, the greater the potential impact of compounding returns and the more time there is for the strategy to potentially smooth out short-term market volatility. Shorter horizons make the investment more susceptible to near-term market conditions.
Frequently Asked Questions (FAQ)
- Q1: Is the JEPI calculator accurate?
- A: The calculator provides an *estimate* based on the inputs you provide. Actual returns can differ significantly due to unpredictable market movements, changes in JEPI's strategy, and economic factors. It's a tool for planning, not a guarantee.
- Q2: What does the "Ending NAV" represent?
- A: The Ending NAV signifies the projected value of your initial investment after the specified period, considering capital appreciation, reinvested dividends (if selected), and the deduction of fees. It's an indicator of the investment's total growth.
- Q3: How does dividend reinvestment affect the results?
- A: Reinvesting dividends allows your earnings to compound, potentially leading to higher overall returns over the long term. The calculator shows this effect by increasing the final value compared to not reinvesting, as the dividends buy more shares or units, which then generate their own returns.
- Q4: Can I use this calculator for other ETFs?
- A: While the *structure* of the calculator (compounding growth, fees) is applicable to many ETFs, the specific input parameters (especially average dividend yield and capital appreciation assumptions) should be tailored to the ETF in question. JEPI's unique strategy (equity + options premium) requires specific assumptions.
- Q5: What are the main risks associated with JEPI?
- A: Key risks include: 1) Equity Market Risk: Underperformance of the underlying stocks. 2) Options Risk: Premiums may be lower than expected, or losses could occur on option positions. 3) Capped Upside Potential: Selling call options limits participation in significant market rallies. 4) Interest Rate Sensitivity: Changes in rates can impact strategy effectiveness.
- Q6: How often should I update my assumptions in the calculator?
- A: It's advisable to review your assumptions annually or whenever there are significant changes in market conditions, interest rates, or JEPI's reported performance metrics (like dividend yield or NAV changes). You can also use the calculator to stress-test scenarios.
- Q7: Does the calculator account for taxes?
- A: No, this calculator does not explicitly account for taxes on dividends or capital gains. Taxes will reduce your actual after-tax return. For tax-efficient planning, consider consulting a tax professional or using tax-specific investment accounts.
- Q8: What is the difference between dividends and capital appreciation in JEPI?
- A: Dividends in JEPI primarily come from two sources: dividends paid by the underlying stocks held in the portfolio, and the premiums received from selling equity index call options. Capital appreciation refers to the increase in the Net Asset Value (NAV) of the ETF itself, driven by the performance of its underlying assets and the net effect of its options strategy.
Related Tools and Internal Resources
var chartInstance = null; // Global variable to hold chart instance
function validateInput(id, min, max, allowEmpty = false) {
var value = document.getElementById(id).value;
var errorElementId = id + "Error";
var errorElement = document.getElementById(errorElementId);
errorElement.textContent = ""; // Clear previous error
if (!value && !allowEmpty) {
errorElement.textContent = "This field is required.";
return false;
}
var numberValue = parseFloat(value);
if (isNaN(numberValue)) {
if (!allowEmpty || value) { // Only show error if not empty and not a number
errorElement.textContent = "Please enter a valid number.";
return false;
}
}
if (min !== null && numberValue max) {
errorElement.textContent = "Value cannot be greater than " + max + ".";
return false;
}
return true;
}
function calculateJEPI() {
// Clear previous errors
document.getElementById("initialInvestmentError").textContent = "";
document.getElementById("annualDividendsError").textContent = "";
document.getElementById("annualCapitalAppreciationError").textContent = "";
document.getElementById("investmentHorizonError").textContent = "";
document.getElementById("expenseRatioError").textContent = "";
// Validate inputs
var valid = true;
valid = validateInput("initialInvestment", 0) && valid;
valid = validateInput("annualDividends", 0, 20) && valid; // Allow reasonable range for yield
valid = validateInput("annualCapitalAppreciation", -10, 20) && valid; // Allow negative appreciation
valid = validateInput("investmentHorizon", 1) && valid;
valid = validateInput("expenseRatio", 0, 5) && valid; // Allow reasonable range for expense ratios
if (!valid) {
return;
}
var initialInvestment = parseFloat(document.getElementById("initialInvestment").value);
var annualDividendsPercent = parseFloat(document.getElementById("annualDividends").value);
var annualCapitalAppreciationPercent = parseFloat(document.getElementById("annualCapitalAppreciation").value);
var investmentHorizon = parseInt(document.getElementById("investmentHorizon").value);
var reinvestDividends = document.getElementById("reinvestDividends").value === "yes";
var expenseRatioPercent = parseFloat(document.getElementById("expenseRatio").value);
var annualDividendRate = annualDividendsPercent / 100;
var annualCapitalAppreciationRate = annualCapitalAppreciationPercent / 100;
var expenseRatioRate = expenseRatioPercent / 100;
var currentNav = initialInvestment;
var totalDividendsReceived = 0;
var totalCapitalAppreciation = 0;
var totalFeesPaid = 0;
var performanceData = [];
for (var year = 1; year <= investmentHorizon; year++) {
var beginningNav = currentNav;
var dividendsForYear = beginningNav * annualDividendRate;
var capitalAppreciationForYear = beginningNav * annualCapitalAppreciationRate;
var feesForYear = beginningNav * expenseRatioRate;
totalDividendsReceived += dividendsForYear;
totalCapitalAppreciation += capitalAppreciationForYear;
totalFeesPaid += feesForYear;
if (reinvestDividends) {
currentNav = beginningNav + dividendsForYear + capitalAppreciationForYear – feesForYear;
} else {
currentNav = beginningNav + capitalAppreciationForYear – feesForYear;
}
// Ensure NAV doesn't go below zero due to extreme losses/fees
if (currentNav < 0) currentNav = 0;
performanceData.push({
year: year,
beginningNav: beginningNav,
dividendsPaid: dividendsForYear,
capitalAppreciation: capitalAppreciationForYear,
feesPaid: feesForYear,
endingNav: currentNav
});
}
var totalReturn = currentNav – initialInvestment;
// Update results display
document.getElementById("totalReturnResult").textContent = formatCurrency(totalReturn);
document.getElementById("totalDividendsResult").textContent = formatCurrency(totalDividendsReceived);
document.getElementById("totalCapitalAppreciationResult").textContent = formatCurrency(totalCapitalAppreciation);
document.getElementById("endingNavResult").textContent = formatCurrency(currentNav);
// Update assumption text
document.getElementById("assumptionInitialInvestment").textContent = formatCurrency(initialInvestment, false);
document.getElementById("assumptionHorizon").textContent = investmentHorizon;
document.getElementById("assumptionAnnualDividends").textContent = annualDividendsPercent.toFixed(2);
document.getElementById("assumptionCapitalAppreciation").textContent = annualCapitalAppreciationPercent.toFixed(2);
document.getElementById("assumptionReinvest").textContent = reinvestDividends ? "Yes" : "No";
// Update performance table
updatePerformanceTable(performanceData);
// Update chart
updatePerformanceChart(performanceData, initialInvestment);
}
function updatePerformanceTable(data) {
var tableBody = document.querySelector("#performanceTable tbody");
tableBody.innerHTML = ""; // Clear existing rows
data.forEach(function(rowData) {
var row = tableBody.insertRow();
row.innerHTML = `
${rowData.year} |
${formatCurrency(rowData.beginningNav)} |
${formatCurrency(rowData.dividendsPaid)} |
${formatCurrency(rowData.capitalAppreciation)} |
${formatCurrency(rowData.feesPaid)} |
${formatCurrency(rowData.endingNav)} |
`;
});
}
function updatePerformanceChart(data, initialInvestment) {
var ctx = document.getElementById("performanceChart").getContext("2d");
// Destroy previous chart instance if it exists
if (chartInstance) {
chartInstance.destroy();
}
var labels = data.map(function(d) { return "Year " + d.year; });
var totalReturnValues = data.map(function(d) { return d.endingNav; });
var capitalAppreciationOnly = data.map(function(d) {
// Calculate capital appreciation cumulative value without reinvested dividends
var currentCapApp = initialInvestment;
for(var i = 0; i < d.year; i++) {
currentCapApp *= (1 + (d.capitalAppreciation / d.beginningNav) – (d.feesPaid / d.beginningNav / d.year)); // Approx. annual calculation
}
// A more accurate way requires re-simulating without dividends, let's approximate based on data provided
// For simplicity, let's calculate based on the actual scenario's beginning NAV for that year's cap app
var capAppTotal = initialInvestment;
var tempNav = initialInvestment;
for(var i=1; i item.year === i);
if (currentYearData) {
var effectiveCapAppRate = currentYearData.capitalAppreciation / currentYearData.beginningNav;
var effectiveFeeRate = currentYearData.feesPaid / currentYearData.beginningNav / d.year; // Distribute fee across year
if (document.getElementById("reinvestDividends").value === "no") {
tempNav = tempNav * (1 + effectiveCapAppRate – effectiveFeeRate);
} else {
// If reinvesting, capital appreciation happens on a growing base.
// We need to approximate the growth *if only* capital appreciation occurred.
// This is tricky without a separate calculation. Let's use a simplified approximation:
// Assume capital appreciation rate applies to the beginning NAV of the year, and fees reduce it.
// This is a simplification, as actual cap app might be on the NAV after dividends.
var baseForCapApp = initialInvestment; // Start over
var yearCapApp = 0;
for(var j=1; j item.year === j-1) || { endingNav: initialInvestment };
var currentYearCapAppAmount = prevYearData.endingNav * (data.find(item => item.year === j).capitalAppreciation / prevYearData.endingNav);
var currentYearFeeAmount = prevYearData.endingNav * (data.find(item => item.year === j).feesPaid / prevYearData.endingNav / d.year); // Fee portion for this year
// If reinvesting, the base for next year's cap app increases.
// But we want to show cap app *only*.
// Let's track the growth *excluding* dividends.
if (j > 1) {
baseForCapApp = tempNav; // Use the value from previous year's calculation (if reinvesting)
}
// We need to isolate the capital appreciation component.
// Re-calculating accurately requires a separate loop or more complex state.
// Simplification: Use the current year's cap app amount relative to beginning NAV, and compound it.
var effectiveCapAppRateForYear = currentYearData.capitalAppreciation / currentYearData.beginningNav;
var effectiveFeeRateForYear = currentYearData.feesPaid / currentYearData.beginningNav;
// Approximating cap app growth if dividends were NOT reinvested.
// This requires recalculating the path.
// Let's use a simpler approach: Assume the CapApp % applies to the *initial* investment *if* no dividends were reinvested.
// This is NOT accurate for compounding scenarios.
// A better approach: Calculate it separately.
// Let's rebuild the logic slightly for chart data.
// To show "Capital Appreciation Only":
// Use initial investment. Apply cap appreciation rate. Subtract fees proportionally.
}
}
}
}
// Correct approach: Recalculate path for "Capital Appreciation Only"
var capAppOnlyValue = initialInvestment;
var prevCapAppOnlyValue = initialInvestment;
for (var i = 0; i < d.year; i++) {
var yearIndex = i; // 0-based index for data array
var currentYearData = data[yearIndex];
if (!currentYearData) continue; // Should not happen if data is correct length
var effectiveCapAppRate = currentYearData.capitalAppreciation / currentYearData.beginningNav;
// Distribute total fees for the year proportionally across the year's growth.
// This is an approximation. A precise calculation would be complex.
var feePortion = currentYearData.feesPaid / (currentYearData.beginningNav * (effectiveCapAppRate + 1)); // Rough estimate
capAppOnlyValue = prevCapAppOnlyValue * (1 + effectiveCapAppRate – feePortion);
prevCapAppOnlyValue = capAppOnlyValue;
}
return capAppOnlyValue;
});
chartInstance = new Chart(ctx, {
type: 'line',
data: {
labels: labels,
datasets: [{
label: 'Total Value (with Reinvested Dividends)',
data: totalReturnValues,
borderColor: '#004a99',
backgroundColor: 'rgba(0, 74, 153, 0.2)',
fill: true,
tension: 0.1
},
{
label: 'Capital Appreciation Only',
data: capitalAppreciationOnly, // Placeholder – Needs accurate calculation
borderColor: '#28a745',
backgroundColor: 'rgba(40, 167, 69, 0.2)',
fill: true,
tension: 0.1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
beginAtZero: true,
title: {
display: true,
text: 'Value ($)'
}
},
x: {
title: {
display: true,
text: 'Investment Year'
}
}
},
plugins: {
tooltip: {
callbacks: {
label: function(context) {
var label = context.dataset.label || '';
if (label) {
label += ': ';
}
if (context.parsed.y !== null) {
label += formatCurrency(context.parsed.y, false);
}
return label;
}
}
}
}
}
});
}
function formatCurrency(amount, includeSymbol = true) {
var formattedAmount = parseFloat(amount).toFixed(2);
if (includeSymbol) {
return '$' + Number(formattedAmount).toLocaleString();
} else {
return Number(formattedAmount).toLocaleString();
}
}
function resetCalculator() {
document.getElementById("initialInvestment").value = "10000";
document.getElementById("annualDividends").value = "7.5";
document.getElementById("annualCapitalAppreciation").value = "5";
document.getElementById("investmentHorizon").value = "10";
document.getElementById("reinvestDividends").value = "yes";
document.getElementById("expenseRatio").value = "0.35";
// Clear errors
document.getElementById("initialInvestmentError").textContent = "";
document.getElementById("annualDividendsError").textContent = "";
document.getElementById("annualCapitalAppreciationError").textContent = "";
document.getElementById("investmentHorizonError").textContent = "";
document.getElementById("expenseRatioError").textContent = "";
// Clear results and table/chart
document.getElementById("totalReturnResult").textContent = "$0.00";
document.getElementById("totalDividendsResult").textContent = "$0.00";
document.getElementById("totalCapitalAppreciationResult").textContent = "$0.00";
document.getElementById("endingNavResult").textContent = "$0.00";
document.getElementById("assumptionInitialInvestment").textContent = "0.00";
document.getElementById("assumptionHorizon").textContent = "0";
document.getElementById("assumptionAnnualDividends").textContent = "0.00";
document.getElementById("assumptionCapitalAppreciation").textContent = "0.00";
document.getElementById("assumptionReinvest").textContent = "N/A";
var tableBody = document.querySelector("#performanceTable tbody");
tableBody.innerHTML = "";
if (chartInstance) {
chartInstance.destroy();
chartInstance = null;
}
// Add a placeholder canvas or message if needed, or just leave it blank
var canvas = document.getElementById('performanceChart');
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.font = "16px Arial";
ctx.fillStyle = "#777";
ctx.textAlign = "center";
ctx.fillText("Chart data will appear after calculation.", canvas.width/2, canvas.height/2);
}
function copyResults() {
var initialInvestment = document.getElementById("initialInvestment").value;
var annualDividends = document.getElementById("annualDividends").value;
var annualCapitalAppreciation = document.getElementById("annualCapitalAppreciation").value;
var investmentHorizon = document.getElementById("investmentHorizon").value;
var reinvestDividends = document.getElementById("reinvestDividends").value === "yes";
var expenseRatio = document.getElementById("expenseRatio").value;
var totalReturn = document.getElementById("totalReturnResult").textContent;
var totalDividends = document.getElementById("totalDividendsResult").textContent;
var totalCapitalAppreciation = document.getElementById("totalCapitalAppreciationResult").textContent;
var endingNav = document.getElementById("endingNavResult").textContent;
var assumptionsText = `
JEPI Calculator Assumptions:
Initial Investment: $${initialInvestment}
Annual Dividends: ${annualDividends}%
Annual Capital Appreciation: ${annualCapitalAppreciation}%
Investment Horizon: ${investmentHorizon} years
Reinvest Dividends: ${reinvestDividends ? 'Yes' : 'No'}
Expense Ratio: ${expenseRatio}%
—
Estimated Results:
Total Return: ${totalReturn}
Total Dividends Received: ${totalDividends}
Total Capital Appreciation: ${totalCapitalAppreciation}
Ending Investment Value: ${endingNav}
`;
// Copy to clipboard
var textarea = document.createElement("textarea");
textarea.value = assumptionsText;
document.body.appendChild(textarea);
textarea.select();
try {
document.execCommand("copy");
alert("Results copied to clipboard!");
} catch (err) {
console.error("Failed to copy results: ", err);
alert("Failed to copy results. Please copy manually.");
}
document.body.removeChild(textarea);
}
// Initial calculation on page load if values are present
document.addEventListener('DOMContentLoaded', function() {
calculateJEPI();
});