The one-year earnings decline is not helping Trex Company's (NYSE:TREX share price, as stock falls another 4.7% in past week

While not a mind-blowing move, it is good to see that the Trex Company, Inc. (NYSE:TREX) share price has gained 11% in the last three months. But that doesn't change the reality of under-performance over the last twelve months. In fact, the price has declined 15% in a year, falling short of the returns you could get by investing in an index fund.

With the stock having lost 4.7% in the past week, it's worth taking a look at business performance and seeing if there's any red flags.

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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. 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).

Unhappily, Trex Company had to report a 21% decline in EPS over the last year. The share price fall of 15% isn't as bad as the reduction in earnings per share. So the market may not be too worried about the EPS figure, at the moment -- or it may have expected earnings to drop faster.

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

Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here.

A Different Perspective

Trex Company shareholders are down 15% for the year, but the market itself is up 25%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 1.2% over the last half decade. Generally speaking long term share price weakness can be a bad sign, though contrarian investors might want to research the stock in hope of a turnaround. It's always interesting to track share price performance over the longer term. But to understand Trex Company better, we need to consider many other factors. To that end, you should learn about the 2 warning signs we've spotted with Trex Company (including 1 which is significant) .

But note: Trex Company may not be the best stock to buy. So take a peek at this free list of interesting companies with past earnings growth (and further growth forecast).

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.