Share Price and Dividend Forecasting Calculator with compounding

compounding_calc.ts

const buyAvgRate = 367.01;
let numberOfShares = 532;
const numberOfSharesForNonCompounding = 532;

let sharePrice = 367.01;
const sharePriceGrowth = 0.085; // 8%

let dividendPerShare = 12.5;
const dividendGrowthRate = 0.15; // 15%

let incomeTax = 0.15; // 15% income tax on dividend
let totalDividendPaidPerShare = 0;

const yearsOfHolding = 5;
for (let year = 1; year <= yearsOfHolding; year++) {
  totalDividendPaidPerShare += dividendPerShare * 0.85;

  // update the values by growth rate
  dividendPerShare = Math.round(dividendPerShare * (1 + dividendGrowthRate));

  sharePrice = Math.round(sharePrice * (1 + sharePriceGrowth));

  // buy more shares from dividend
  numberOfShares += Math.round(Math.ceil((dividendPerShare*0.85*numberOfShares) / sharePrice));
}

console.log('Total Dividend/Share: ', totalDividendPaidPerShare);
console.log('Total Dividend: ', totalDividendPaidPerShare * numberOfShares);
console.log('Total Shares: ', numberOfShares);
console.log('Share Price: ', sharePrice);
console.log(`Share Price Growht(%): ${sharePrice/367.01*100}`);

console.log('----------------------------');
console.log('Total Value of Portfolio:', numberOfShares * sharePrice );
console.log('Total Value of Portfolio(without compounding):', numberOfSharesForNonCompounding * sharePrice );
console.log('----------------------------');