Investment simulation on FIIs over years

calc_invest.py

# Investment simulation on FIIs over years

import math
import matplotlib.pyplot as plt
import locale
locale.setlocale(locale.LC_ALL, '')

# FII
price = 10
dividends = 0.08
shares = 0

# Input
months = 12*10
monthly_invest = 5000.0
init = fund = 0.0
hist = [init+monthly_invest]

# Share Update
su = lambda shares,fund,price: (shares+int(fund/price), fund%price)

# Compound Interest
for i in range(months):
    fund += monthly_invest
    shares, fund = su(shares,fund,price)
    fund += shares*dividends
    hist.append(fund+shares*price)
shares, fund = su(shares,fund,price)

legacy = round(shares*price+fund,2)
invest = round(abs(init+months*monthly_invest), 2)
profit = round(legacy-invest, 2)
profit_month = round(shares*dividends, 2)

# Display
print('legacy: {}'.format(locale.currency(legacy, grouping=True)))
print('total investment: {}'.format(locale.currency(invest, grouping=True)))
print('total profit: {}'.format(locale.currency(profit, grouping=True)))
print('monthly profit: {} ({}% a.m.)'.format(locale.currency(profit_month, grouping=True), round(dividends*100/price, 2)))
print('shares: {}'.format(shares))

plt.plot(hist)

Example:

• 5 years with 5k after that 10 years with 0k (price: 10, dividends: 0.08)