The worst result, after buying shares in a company (assuming no leverage), would be if you lose all the money you put in. But on the bright side, you can make far more than 100% on a really good stock. Long term AutoNation, Inc. (NYSE:AN) shareholders would be well aware of this, since the stock is up 279% in five years. We note the stock price is up 3.3% in the last seven days.

The past week has proven to be lucrative for AutoNation investors, so let's see if fundamentals drove the company's five-year performance.

To paraphrase Benjamin Graham: Over the short term the market is a voting machine, but over the long term it's a weighing machine. 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.

Over half a decade, AutoNation managed to grow its earnings per share at 35% a year. So the EPS growth rate is rather close to the annualized share price gain of 31% per year. That suggests that the market sentiment around the company hasn't changed much over that time. In fact, the share price seems to largely reflect the EPS growth.

The company's earnings per share (over time) is depicted in the image below (click to see the exact numbers).

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. It might be well worthwhile taking a look at our free report on AutoNation's earnings, revenue and cash flow.

A Different Perspective

AutoNation shareholders are up 14% for the year. But that return falls short of the market. It's probably a good sign that the company has an even better long term track record, having provided shareholders with an annual TSR of 31% over five years. It's quite possible the business continues to execute with prowess, even as the share price gains are slowing. It's always interesting to track share price performance over the longer term. But to understand AutoNation better, we need to consider many other factors. Take risks, for example - AutoNation has 3 warning signs (and 1 which makes us a bit uncomfortable) we think you should know about.

AutoNation is not the only stock that insiders are buying. For those who like to find lesser know companies 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.