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This Model Suggests AstraZeneca plc Could Deliver A 6.3% Annual Return

One of the risks of being an income investor is that you can be seduced by attractive yields, which are sometimes a symptom of a declining business or a falling share price.

Take AstraZeneca (LSE: AZN) (NYSE: AZN.US), for example. The firm’s 5.2% prospective yield is attractive, but, 5.2% is substantially less than the long-term average total return from UK equities, which is about 8%.

AstraZeneca’s earnings are expected to continue to fall next year, meaning that the firm is in the unattractive situation of looking more expensive in the future than it does today. Investors are dependent on the firm’s management turning around this decline to support future share price growth — otherwise Astra’s dividend yield could be cancelled out by a falling share price.

What will AstraZeneca’s total return be?

Looking ahead, I need to know the expected total return from AstraZeneca shares, so that I can compare them to my benchmark, a FTSE 100 tracker.

The dividend discount model is a technique that’s widely used to value dividend-paying shares. A variation of this model also allows you to calculate the expected rate of return on a dividend paying share:

Total return = (Prospective dividend ÷ current share price) + expected dividend growth rate

Here’s how this formula looks for AstraZeneca:

(1.755 ÷ 32.86) + 0.01 = 0.063 x 100 = 6.3%

My model indicates that AstraZeneca shares could deliver a 6.3% annual return over the next few years, suggesting that they may underperform the long-term average total return of 8% per year I’d expect from a FTSE 100 tracker.

Isn’t this too simple?

One limitation of this formula is that it doesn’t tell you whether a company can afford to keep paying and growing its dividend.

My preferred measure of dividend affordability is free cash flow — the cash that’s left after capital expenditure and tax costs.

Free cash flow is normally defined as operating cash flow – tax – capex.

Despite its falling earnings, Astra has low debt levels and remains very profitable. The pharmaceutical firm’s £3.7bn dividend payout in 2012 was generously covered by free cash flow of £5.6bn.

I believe Astra’s desirable dividend will remain safe, but the timing of the firm’s turnaround is less certain and the firm’s share price could underperform the market in the meantime, as investors become wary of paying too much for falling future earnings.

Today's top income choice?

AstraZeneca has underperformed both the FTSE 100 and its UK peer GlaxoSmithKline this year, and I think that there are better options available elsewhere for income investors, including one company that's been named by the Motley Fool's analysts as "Today's Top Income Buy".

The company concerned currently offers a 5.5% dividend yield, and the Fool's analysts believe it is currently trading at almost 10% below its fair value.

For full details of the company concerned, click here to download your free copy of this report immediately, as availability is strictly limited.

> Roland does not own shares in AstraZeneca but does own shares in GlaxoSmithKline.