When you buy a stock there is always a possibility that it could drop 100%. But on the bright side, if you buy shares in a high quality company at the right price, you can gain well over 100%. For instance, the price of Amerigo Resources Ltd. (TSE:ARG) stock is up an impressive 126% over the last five years. It's also up 14% in about a month.

So let's assess the underlying fundamentals over the last 5 years and see if they've moved in lock-step with shareholder returns.

Check out our latest analysis for Amerigo Resources

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. 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.

During the five years of share price growth, Amerigo Resources 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.

You can see how EPS has changed over time in the image below (click on the chart to see the exact values).

We know that Amerigo Resources has improved its bottom line lately, but is it going to grow revenue? Check if analysts think Amerigo Resources will grow revenue in the future.

What About Dividends?

As well as measuring the share price return, investors should also consider the total shareholder return (TSR). The TSR incorporates the value of any spin-offs or discounted capital raisings, along with any dividends, based on the assumption that the dividends are reinvested. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. In the case of Amerigo Resources, it has a TSR of 195% for the last 5 years. That exceeds its share price return that we previously mentioned. The dividends paid by the company have thusly boosted the total shareholder return.

A Different Perspective

It's nice to see that Amerigo Resources shareholders have received a total shareholder return of 71% over the last year. Of course, that includes the dividend. Since the one-year TSR is better than the five-year TSR (the latter coming in at 24% 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. 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. Consider for instance, the ever-present spectre of investment risk. We've identified 1 warning sign with Amerigo Resources , and understanding them should be part of your investment process.