The 22% return this week takes Amplify Energy's (NYSE:AMPY) shareholders five-year gains to 183%

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. For instance, the price of Amplify Energy Corp. (NYSE:AMPY) stock is up an impressive 183% over the last five years. Also pleasing for shareholders was the 64% gain in the last three months.

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

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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).

During the five years of share price growth, Amplify Energy moved from a loss to profitability. Sometimes, the start of profitability is a major inflection point that can signal fast earnings growth to come, which in turn justifies very strong share price gains.

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

It's good to see that there was some significant insider buying in the last three months. That's a positive. That said, we think earnings and revenue growth trends are even more important factors to consider. It might be well worthwhile taking a look at our free report on Amplify Energy's earnings, revenue and cash flow.

A Different Perspective

While the broader market gained around 16% in the last year, Amplify Energy shareholders lost 51%. Even the share prices of good stocks drop sometimes, but we want to see improvements in the fundamental metrics of a business, before getting too interested. Longer term investors wouldn't be so upset, since they would have made 23%, each year, over five years. It could be that the recent sell-off is an opportunity, so it may be worth checking the fundamental data for signs of a long term growth trend. It's always interesting to track share price performance over the longer term. But to understand Amplify Energy better, we need to consider many other factors. To that end, you should learn about the 3 warning signs we've spotted with Amplify Energy (including 1 which is potentially serious) .

Amplify Energy 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.