The most you can lose on any stock (assuming you don't use leverage) is 100% of your money. But on a lighter note, a good company can see its share price rise well over 100%. For instance, the price of West Pharmaceutical Services, Inc. (NYSE:WST) stock is up an impressive 266% over the last five years. On the other hand, the stock price has retraced 4.0% in the last week. But note that the broader market is down 3.7% since last week, and this may have impacted West Pharmaceutical Services' share price.

Although West Pharmaceutical Services has shed US$1.1b from its market cap this week, let's take a look at its longer term fundamental trends and see if they've driven returns.

See our latest analysis for West Pharmaceutical Services

There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. One way to examine how market sentiment has changed over time is to look at the interaction between a company's share price and its earnings per share (EPS).

Over half a decade, West Pharmaceutical Services managed to grow its earnings per share at 28% a year. So the EPS growth rate is rather close to the annualized share price gain of 30% per year. Therefore one could conclude that sentiment towards the shares hasn't morphed very much. Rather, the share price has approximately tracked EPS growth.

The image below shows how EPS has tracked over time (if you click on the image you can see greater detail).

This free interactive report on West Pharmaceutical Services' earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

What About Dividends?

When looking at investment returns, it is important to consider the difference between total shareholder return (TSR) and share price return. 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, West Pharmaceutical Services' TSR for the last 5 years was 271%, which exceeds the share price return mentioned earlier. This is largely a result of its dividend payments!

A Different Perspective

It's good to see that West Pharmaceutical Services has rewarded shareholders with a total shareholder return of 57% in the last twelve months. And that does include the dividend. Since the one-year TSR is better than the five-year TSR (the latter coming in at 30% per year), it would seem that the stock's performance has improved in recent times. Given the share price momentum remains strong, it might be worth taking a closer look at the stock, lest you miss an opportunity. Most investors take the time to check the data on insider transactions. You can click here to see if insiders have been buying or selling.

But note: West Pharmaceutical Services may not be the best stock to buy. So take a peek at this free list of interesting companies with past earnings growth (and further growth forecast).

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.