The worst result, after buying shares in a company (assuming no leverage), would be if you lose all the money you put in. But when you pick a company that is really flourishing, you can make more than 100%. To wit, the Emerald Resources NL (ASX:EMR) share price has flown 170% in the last three years. Most would be happy with that. On top of that, the share price is up 24% in about a quarter. The company reported its financial results recently; you can catch up on the latest numbers by reading our company report.

So let's investigate and see if the longer term performance of the company has been in line with the underlying business' progress.

Check out our latest analysis for Emerald Resources

To quote Buffett, 'Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace...' 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, Emerald Resources moved from a loss to profitability. Given the importance of this milestone, it's not overly surprising that the share price has increased strongly.

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

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 Emerald Resources' earnings, revenue and cash flow.

A Different Perspective

It's good to see that Emerald Resources has rewarded shareholders with a total shareholder return of 12% in the last twelve months. Having said that, the five-year TSR of 20% a year, is even better. Potential buyers might understandably feel they've missed the opportunity, but it's always possible business is still firing on all cylinders. 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. Take risks, for example - Emerald Resources has 1 warning sign we think you should be aware of.

There are plenty of other companies that have insiders buying up shares. You probably do not want to miss this free list of growing companies that insiders are buying.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on AU exchanges.