Targa Resources Corp. (NYSE:TRGP) shareholders might be concerned after seeing the share price drop 15% in the last month. But over five years returns have been remarkably great. To be precise, the stock price is 340% higher than it was five years ago, a wonderful performance by any measure. So we don't think the recent decline in the share price means its story is a sad one. But the real question is whether the business fundamentals can improve over the long term.

Although Targa Resources has shed US$1.4b from its market cap this week, let's take a look at its longer term fundamental trends and see if they've driven returns.

There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. One flawed but reasonable way to assess how sentiment around a company has changed is to compare the earnings per share (EPS) with the share price.

During the five years of share price growth, Targa Resources moved from a loss to profitability. That kind of transition can be an inflection point that justifies a strong share price gain, just as we have seen here. Given that the company made a profit three years ago, but not five years ago, it is worth looking at the share price returns over the last three years, too. We can see that the Targa Resources share price is up 236% in the last three years. Meanwhile, EPS is up 59% per year. This EPS growth is reasonably close to the 50% average annual increase in the share price (over three years, again). That suggests that the market sentiment around the company hasn't changed much over that time. There's a strong correlation between the share price and EPS.

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

It is of course excellent to see how Targa Resources has grown profits over the years, but the future is more important for shareholders. It might be well worthwhile taking a look at our free report on how its financial position has changed over time.

What About Dividends?

It is important to consider the total shareholder return, as well as the share price return, for any given stock. Whereas the share price return only reflects the change in the share price, the TSR includes the value of dividends (assuming they were reinvested) and the benefit of any discounted capital raising or spin-off. It's fair to say that the TSR gives a more complete picture for stocks that pay a dividend. In the case of Targa Resources, it has a TSR of 397% for the last 5 years. That exceeds its share price return that we previously mentioned. And there's no prize for guessing that the dividend payments largely explain the divergence!

A Different Perspective

We're pleased to report that Targa Resources shareholders have received a total shareholder return of 108% over one year. And that does include the dividend. Since the one-year TSR is better than the five-year TSR (the latter coming in at 38% per year), it would seem that the stock's performance has improved in recent times. Someone with an optimistic perspective could view the recent improvement in TSR as indicating that the business itself is getting better with time. 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. To that end, you should be aware of the 3 warning signs we've spotted with Targa Resources .

If you are like me, then you will not want to miss this free list of undervalued small caps 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 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.