The simplest way to invest in stocks is to buy exchange traded funds. But you can significantly boost your returns by picking above-average stocks. To wit, the Armstrong World Industries, Inc. (NYSE:AWI) share price is 72% higher than it was a year ago, much better than the market return of around 22% (not including dividends) in the same period. So that should have shareholders smiling. However, the stock hasn't done so well in the longer term, with the stock only up 3.9% in three years.

So let's assess the underlying fundamentals over the last 1 year and see if they've moved in lock-step with shareholder returns.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. 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.

Armstrong World Industries was able to grow EPS by 21% in the last twelve months. The share price gain of 72% certainly outpaced the EPS growth. This indicates that the market is now more optimistic about the stock.

You can see below how EPS has changed over time (discover the exact values by clicking on the image).

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

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. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. As it happens, Armstrong World Industries' TSR for the last 1 year was 74%, 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 Armstrong World Industries has rewarded shareholders with a total shareholder return of 74% in the last twelve months. That's including the dividend. Since the one-year TSR is better than the five-year TSR (the latter coming in at 5% 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. For example, we've discovered 1 warning sign for Armstrong World Industries that you should be aware of before investing here.

If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this free list of companies that have proven they can grow earnings.

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.