In order to justify the effort of selecting individual stocks, it's worth striving to beat the returns from a market index fund. But in any portfolio, there are likely to be some stocks that fall short of that benchmark. We regret to report that long term Comcast Corporation (NASDAQ:CMCSA) shareholders have had that experience, with the share price dropping 17% in three years, versus a market return of about 31%.

With that in mind, it's worth seeing if the company's underlying fundamentals have been the driver of long term performance, or if there are some discrepancies.

To quote Buffett, 'Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace...' One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

During the unfortunate three years of share price decline, Comcast actually saw its earnings per share (EPS) improve by 6.7% per year. Given the share price reaction, one might suspect that EPS is not a good guide to the business performance during the period (perhaps due to a one-off loss or gain). Or else the company was over-hyped in the past, and so its growth has disappointed.

Since the change in EPS doesn't seem to correlate with the change in share price, it's worth taking a look at other metrics.

With revenue flat over three years, it seems unlikely that the share price is reflecting the top line. There doesn't seem to be any clear correlation between the fundamental business metrics and the share price. That could mean that the stock was previously overrated, or it could spell opportunity now.

The graphic below depicts how earnings and revenue have changed over time (unveil the exact values by clicking on the image).

Comcast is well known by investors, and plenty of clever analysts have tried to predict the future profit levels. So it makes a lot of sense to check out what analysts think Comcast will earn in the future (free analyst consensus estimates)

What About Dividends?

It is important to consider the total shareholder return, as well as the share price return, for any given stock. The TSR incorporates the value of any spin-offs or discounted capital raisings, along with any dividends, based on the assumption that the dividends are reinvested. It's fair to say that the TSR gives a more complete picture for stocks that pay a dividend. As it happens, Comcast's TSR for the last 3 years was -9.2%, which exceeds the share price return mentioned earlier. The dividends paid by the company have thusly boosted the total shareholder return.

A Different Perspective

Comcast shareholders are up 5.4% for the year (even including dividends). But that was short of the market average. The silver lining is that the gain was actually better than the average annual return of 2% per year over five year. It is possible that returns will improve along with the business fundamentals. It's always interesting to track share price performance over the longer term. But to understand Comcast better, we need to consider many other factors. Case in point: We've spotted 2 warning signs for Comcast you should be aware of.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of companies we expect will grow earnings.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on American exchanges.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.