When you buy shares in a company, it's worth keeping in mind the possibility that it could fail, and you could lose your money. But when you pick a company that is really flourishing, you can make more than 100%. For instance, the price of American Express Company (NYSE:AXP) stock is up an impressive 100% over the last five years. It's also good to see the share price up 28% over the last quarter. But this move may well have been assisted by the reasonably buoyant market (up 11% in 90 days).

Since it's been a strong week for American Express shareholders, let's have a look at trend of the longer term fundamentals.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just 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 five years of share price growth, American Express achieved compound earnings per share (EPS) growth of 7.5% per year. This EPS growth is lower than the 15% average annual increase in the share price. So it's fair to assume the market has a higher opinion of the business than it did five years ago. That's not necessarily surprising considering the five-year track record of earnings growth.

The graphic below depicts how EPS has changed over time (unveil the exact values by clicking on the image).

We consider it positive that insiders have made significant purchases in the last year. Even so, future earnings will be far more important to whether current shareholders make money. This free interactive report on American Express' earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

What About Dividends?

It is important to consider the total shareholder return, as well as the share price return, for any given stock. Whereas the share price return only reflects the change in the share price, the TSR includes the value of dividends (assuming they were reinvested) and the benefit of any discounted capital raising or spin-off. It's fair to say that the TSR gives a more complete picture for stocks that pay a dividend. As it happens, American Express' TSR for the last 5 years was 115%, which exceeds the share price return mentioned earlier. The dividends paid by the company have thusly boosted the total shareholder return.

A Different Perspective

American Express provided a TSR of 26% over the year (including dividends). That's fairly close to the broader market return. Most would be happy with a gain, and it helps that the year's return is actually better than the average return over five years, which was 17%. Even if the share price growth slows down from here, there's a good chance that this is business worth watching in the long term. It's always interesting to track share price performance over the longer term. But to understand American Express better, we need to consider many other factors. For instance, we've identified 2 warning signs for American Express that you should be aware of.

American Express is not the only stock that insiders are buying. For those who like to find winning investments this free list of growing companies with recent insider purchasing, could be just the ticket.

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.