Spread Type: ${spreadTypeText}

Lower Strike Price: ${formatCurrency(parseFloat(lowerStrikeInput.value))}

Middle Strike Price: ${formatCurrency(parseFloat(middleStrikeInput.value))}

Upper Strike Price: ${formatCurrency(parseFloat(upperStrikeInput.value))}

Premium for Lower Strike Option: ${formatCurrency(parseFloat(lowerPremiumInput.value))}

Premium for Middle Strike Option: ${formatCurrency(parseFloat(middlePremiumInput.value))}

Premium for Upper Strike Option: ${formatCurrency(parseFloat(upperPremiumInput.value))}

Number of Contracts (sets) Traded: ${parseFloat(contractsTradedInput.value)}

Assumed Stock Price at Expiration: ${formatCurrency(parseFloat(stockPriceAtExpirationInput.value))}

Calculated Results

Metric	Value
Total Net Debit/Credit	${outputNetDebitCredit.textContent}
Maximum Profit	${outputMaxProfit.textContent}
Maximum Loss	${outputMaxLoss.textContent}
Lower Break-Even Point	${outputLowerBreakeven.textContent}
Upper Break-Even Point	${outputUpperBreakeven.textContent}
Profit/Loss at Expiration Price	${outputPnlAtExpiration.textContent}

Note: This calculator assumes a classic butterfly spread with equidistant strikes. It does not account for commissions or taxes.

`; element.innerHTML = pdfContent; html2pdf().from(element).set({ margin: [10, 10, 10, 10], filename: 'Butterfly_Spread_Calculator_Report.pdf', image: { type: 'jpeg', quality: 0.98 }, html2canvas: { scale: 2, logging: true, dpi: 192, letterRendering: true }, jsPDF: { unit: 'mm', format: 'a4', orientation: 'portrait' } }).save(); } // Attach event listeners if (calculateButton) { calculateButton.addEventListener('click', calculateButterflySpread); } else { console.error("Calculate button not found."); } if (downloadPdfButton) { downloadPdfButton.addEventListener('click', downloadPDF); } else { console.error("Download PDF button not found."); } });