You are also free to choose a fund that is based on any index that you want. For example, there are index funds set up for just about every market sector there is — energy, precious metals, banking, emerging markets — you name it. All you have to do is decide that you want to participate, then contribute money and sit back and relax. Your stock portfolio will then be on automatic pilot.
The above seems simple enough, but it’s pointless if it’s not put to work toward calculating the actual intrinsic value of the company. And since the residual income valuation formula is an absolute approach to company valuation, it discounts future earnings to get to the fair value of company stock. To calculate the value of the stock, one has to add the book value and the present value of expected future residual income, discounting the cost of equity (illustrated in the first formula below with the symbol . For the purposes of valuation calculation with formula 1, the company will presumably continue to evolve toward maturity, or constant growth. Formula 2 below is for calculating Terminal value. Constant growth () from year is presupposed, according to the PGM (Perpetuity Growth model).
It’s important to understand that residual income doesn’t have the same meaning for equity valuation as it does for personal finance. That’s because it doesn’t entail leftover cash, or so-called disposable income, but it has to do with the income that a company generates, after accounting for capital costs, according either to CAPM (Capital Asset Pricing Model), or APT (Arbitrage Pricing Theory). In other words, residual income valuation is the money the company is likely to be left with, once it covers opportunity costs (or risk costs), relative to the book value of Shareholders’ equity. Bear in mind that firms have no legal obligation to compensate shareholders, like they do for bondholders. However, without this form of compensation for the risk they’re taking with their investment, it’s unlikely they will attract investors. Here’s all of the above, laid out in a plain math formula:
Residual income is the amount of net income generated in excess of the minimum rate of return. Residual income concepts have been used in a number of contexts, including as a measurement of internal corporate performance whereby a company's management team evaluates the return generated relative to the company's minimum required return. Alternatively, in personal finance, residual income is the level of income that an individual has after the deduction of all personal debts and expenses have been paid.