The simplest way to invest in stocks is to buy exchange traded funds. But in our experience, buying the right stocks can give your wealth a significant boost. For example, the AZZ Inc. (NYSE:AZZ) share price is up 97% in the last five years, slightly above the market return. It's fair to say the stock has continued its long term trend in the last year, over which it has risen 66%.

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

While the efficient markets hypothesis continues to be taught by some, it has been proven that markets are over-reactive dynamic systems, and investors are not always rational. 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.

AZZ's earnings per share are down 17% per year, despite strong share price performance over five years.

Essentially, it doesn't seem likely that investors are focused on EPS. Since the change in EPS doesn't seem to correlate with the change in share price, it's worth taking a look at other metrics.

The modest 0.8% dividend yield is unlikely to be propping up the share price. In contrast revenue growth of 13% per year is probably viewed as evidence that AZZ is growing, a real positive. In that case, the company may be sacrificing current earnings per share to drive growth.

The company's revenue and earnings (over time) are depicted in the image below (click to see the exact numbers).

You can see how its balance sheet has strengthened (or weakened) over time in this free interactive graphic.

What About Dividends?

When looking at investment returns, it is important to consider the difference between total shareholder return (TSR) and share price return. 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. Arguably, the TSR gives a more comprehensive picture of the return generated by a stock. As it happens, AZZ's TSR for the last 5 years was 113%, which exceeds the share price return mentioned earlier. This is largely a result of its dividend payments!

A Different Perspective

It's good to see that AZZ has rewarded shareholders with a total shareholder return of 67% in the last twelve months. Of course, that includes the dividend. That's better than the annualised return of 16% over half a decade, implying that the company is doing better recently. Someone with an optimistic perspective could view the recent improvement in TSR as indicating that the business itself is getting better with time. While it is well worth considering the different impacts that market conditions can have on the share price, there are other factors that are even more important. To that end, you should learn about the 4 warning signs we've spotted with AZZ (including 1 which is a bit unpleasant) .

For those who like to find winning investments this free list of undervalued 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.