One simple way to benefit from the stock market is to buy an index fund. But if you pick the right individual stocks, you could make more than that. Just take a look at Belden Inc. (NYSE:BDC), which is up 96%, over three years, soundly beating the market return of 16% (not including dividends). However, more recent returns haven't been as impressive as that, with the stock returning just 3.0% in the last year , including dividends .

After a strong gain in the past week, it's worth seeing if longer term returns have been driven by improving fundamentals.

In his essay The Superinvestors of Graham-and-Doddsville Warren Buffett described how share prices do not always rationally reflect the value of a business. 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 three years of share price growth, Belden achieved compound earnings per share growth of 55% per year. The average annual share price increase of 25% is actually lower than the EPS growth. So it seems investors have become more cautious about the company, over time.

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

We like that insiders have been buying shares in the last twelve months. Even so, future earnings will be far more important to whether current shareholders make money. Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here..

A Different Perspective

Belden shareholders are up 3.0% for the year (even including dividends). But that was short of the market average. If we look back over five years, the returns are even better, coming in at 9% per year for five years. It's quite possible the business continues to execute with prowess, even as the share price gains are slowing. While it is well worth considering the different impacts that market conditions can have on the share price, there are other factors that are even more important. Take risks, for example - Belden has 1 warning sign we think you should be aware of.

Belden 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.