If you love investing in stocks you're bound to buy some losers. Long term Charter Communications, Inc. (NASDAQ:CHTR) shareholders know that all too well, since the share price is down considerably over three years. Regrettably, they have had to cope with a 51% drop in the share price over that period. And the ride hasn't got any smoother in recent times over the last year, with the price 23% lower in that time. Shareholders have had an even rougher run lately, with the share price down 27% in the last 90 days. This could be related to the recent financial results - you can catch up on the most recent data by reading our company report.

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.

There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. By comparing earnings per share (EPS) and share price changes over time, we can get a feel for how investor attitudes to a company have morphed over time.

During the unfortunate three years of share price decline, Charter Communications actually saw its earnings per share (EPS) improve by 26% per year. This is quite a puzzle, and suggests there might be something temporarily buoying the share price. 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.

Revenue is actually up 4.3% over the three years, so the share price drop doesn't seem to hinge on revenue, either. It's probably worth investigating Charter Communications further; while we may be missing something on this analysis, there might also be an opportunity.

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

It's good to see that there was some significant insider buying in the last three months. That's a positive. That said, we think earnings and revenue growth trends are even more important factors to consider. You can see what analysts are predicting for Charter Communications in this interactive graph of future profit estimates.

A Different Perspective

While the broader market gained around 26% in the last year, Charter Communications shareholders lost 23%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 3% per year over five years. We realise that Baron Rothschild has said investors should "buy when there is blood on the streets", but we caution that investors should first be sure they are buying a high quality business. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. For example, we've discovered 1 warning sign for Charter Communications that you should be aware of before investing here.

Charter Communications is not the only stock insiders are buying. So take a peek at this free list of growing companies with insider buying.

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.