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Posted 03 November 2007 - 12:46 AM
Most investors buy common stocks for two reasons. Stocks typically offer investors a cash dividend in addition to the potential for capital gains. Here we will present a method of calculating stock prices based on a constant growth model which uses a discounted cash flows approach.
Calculating Today's Stock Prices
Since investors buy stocks for both the dividends they pay today and the possibility of a gain in a stock's selling price, then the expected return the investor can be expressed by the following calculation:
Expected Return = (Dividends Paid + Capital Gain) / Price of Stock
This expected return for a stock is also known as the market capitalization rate or discount rate. We're going to use all three terms interchangeably throughout our calculations / explanations in this article. Let's look at a quick example of how this works.
These are our assumptions:
* Price of Stock A is currently $100.00 per share or (P0).
* Dividends are expected to be $3.00 per share (Div).
* The price of Stock A is expected to be $105.00 per share in one year's time (P1). Therefore our capital gain is expected to be $105.00 - $100.00 or $5.00 per share.
In this example:
Expected Return, or R = ($3.00 + $5.00) / $100.00 = 8.0%
We can now use this expected return to calculate the price of a stock in the same risk class as Stock A using the following formula:
Stock Price = (Dividends Paid (Div) + Expected Price (P1)) / (1 + Expected Return ®)
Proving this calculation with our example information above, we have:
Stock Price = ($3.00 + $105) / (1 + 0.08) = $108.00 / 1.08 = $100
Some of you may recognize this stock price calculation as the beginnings of a discounted cash flow formula. Essentially, the price of a stock is the cash flows gained by the stockholder divided by the discount rate or market capitalization rate.
Discounted Cash Flows and Stock Pricing
The stock prices we just calculated are really just short term values - a one year horizon. But let's think about the value of a stock over a nearly infinite timeline. Let's say a stockholder plans to sell their stock in 100 years. In this example the value of the stock would be all of the dividends received each year plus the capital gain of the stock in 100 years.
We know from our prior example that the investor's expected return was 8.0% and the growth rate of the stock was 5.0%. In 100 years the stock's price would be:
$100 x (1.05)^100 = $13,150.13
If we discount this by the expected return, or discount rate, we find:
$13,150.13 / (1.08)^100 = $13,150.13 / 2,119.76 = $5.98
What this tells us is that the current price of a stock has very little to do with the future price of the stock. The net present value of the stock's price in 100 years is only $5.98! We could run through all the calculations, but $94.02 ($100.00 - $5.98) of the stock's price is derived from the present value of the dividend received each year.
In fact, when taken to an infinite timeline, the price of stock has nothing to do at all with capital gains way out in that infinite future. It is simply a function of the dividend stream divided by the return that can be derived from stocks of similar risk. This allows us to simply our stock pricing formula:
Stock Price = Sum of Dividends (Div) in each Time (T) / (1 + R)^T
You might recognize this formula as the discounted cash flow formula where stock dividends are substituted for cash flows.
Stock Pricing via Constant Growth Model
In fact, we can further simplify this stock price formula by applying a constant growth model to the company's dividends. This is similar to simplifications that are used in evaluating returns in perpetuity. Using this model our stock price formula then becomes:
Stock Price = Dividends (Div) / (Expected Return ® - Dividend Growth Rate (G))
Stock Price = Div / (R - G)
This constant growth stock pricing model does not mean the stock's dividends will remain the same over time, only that the growth rate is constant over a long period of time. And by examining this stock pricing formula, you'll see that it only works when the expected return, or discount rate, is greater than the dividend growth rate - an assumption that is quite logical.
Estimating Market Capitalization and Dividend Growth Rates
Now that we have a simple formula to calculate a stock's price, we need to figure out how to calculate all of the individual variables in that formula - in particular the projected growth rate in dividends and the market capitalization rate (discount rate or expected return).
Estimating Dividend Growth Rates
An estimate of a company's dividend growth rate can be made by examining a company's projected earnings growth rate. This estimate assumes that the return on equity for a company and its payout ratio remain constant.
Dividend growth can be then be estimated using the following calculation:
Dividend Growth (G) = Plowback Ratio x Return on Equity
* Plowback Ratio = 1 - Payout Ratio, and
* Payout Ratio = Dividends Paid / Earnings per Share, and
* Return on Equity = Earnings per Share / Book Equity per Share
All of these variables can be easily calculated when you're researching a stock. They are often calculated for you by many of the online stock research tools. We've also taken the time to group and explain the significance of many of these variables in our article on financial ratios.
Sticking with our example, if Stock A has a payout ratio of 60% - that means they pay out 60% of earnings in terms of dividends - then their plowback ratio is 1 - 60% or 40%. Let's also assume their return on equity is 10.0%. That means their estimated dividend growth rate is:
Dividend Growth (G) = 40% x 10% = 4.0%
Estimating Market Capitalization Rates
If we go back to our simplified stock price formula, we can use that same calculation to develop an estimate of the discount rate (or market capitalization rate). Rearranging this formula we have:
Discount Rate ® = (Dividends (Div) / Stock Price (P0)) + Dividend Growth Rate (G)
Remember, if we are going to develop estimated prices for stocks, we're going to need to figure out what the proper discount rate (expected stockholder return) should be based on stocks of equivalent risk. That means we need to calculate the discount rate for stocks that are of equivalent risk to the one we're thinking about buying.
We've already discussed how the dividend growth rate can be calculated, so we only need to solve for this portion of the discount rate equation:
Dividends / Stock Price
Fortunately, this particular ratio is a commonly published stock ratio and is known as the dividend yield. In this example, we are examining a stock of equivalent risk to Stock A. Let's assume that Stock B has:
* Dividend yield of 7.0%
* Payout Ratio of 45%
* Return on Equity of 12%
First solving for the dividend growth rate:
Dividend Growth (G) = 55% x 12% = 6.6%
Finally, solving for the discount rate:
Discount Rate ® = 7.0% + 6.6% = 13.6%
We've now have a method for calculating a stock's price based on some fundamental information about the stock itself and information on stocks of equivalent risk. That is, we've now explained how to calculate all of the variables in our stock pricing formula:
Stock Price = Div / (R - G)
Drawbacks of the Constant Growth Stock Pricing Method
The simple discounted cash flow approach to pricing stocks is extremely useful in valuing and evaluating stocks. Just make sure you're not too focused on the formula's themselves and not the stock prices these formulas are calculating.
For example, the estimation of the discount rate is very important and needs to be made on stocks of equivalent risk. In the computer age in which we live, it is quite simple to develop this estimate based on a reasonably high (ten plus) number of stocks.
You also need to pay attention to the growth rates you're using. If the company you're evaluating has a relatively high growth rate, you need to be realistic about the sustainability of that particular growth rate over time.
Finally, keep in mind that the stock market is a pretty efficient market. If the stock prices you're calculating are very different than the actual market prices, then you need to take a second look at your assumptions. There is no such thing as easy money when it comes to picking stocks, if there was we'd all be rich.
Posted 03 November 2007 - 01:53 AM
Posted 03 November 2007 - 10:54 AM
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Posted 03 November 2007 - 12:09 PM
yani aadmi ab acha article soch samajh kar chapay. log mobile number mangna shru hojaingay
Posted 03 November 2007 - 01:49 PM