Despite an already strong run, TEGNA Inc. (NYSE:TGNA) shares have been powering on, with a gain of 27% in the last thirty days. Looking back a bit further, it's encouraging to see the stock is up 26% in the last year.

Although its price has surged higher, TEGNA's price-to-earnings (or "P/E") ratio of 7.2x might still make it look like a strong buy right now compared to the market in the United States, where around half of the companies have P/E ratios above 19x and even P/E's above 35x are quite common. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's so limited.

While the market has experienced earnings growth lately, TEGNA's earnings have gone into reverse gear, which is not great. The P/E is probably low because investors think this poor earnings performance isn't going to get any better. If this is the case, then existing shareholders will probably struggle to get excited about the future direction of the share price.

Does Growth Match The Low P/E?

In order to justify its P/E ratio, TEGNA would need to produce anemic growth that's substantially trailing the market.

Taking a look back first, the company's earnings per share growth last year wasn't something to get excited about as it posted a disappointing decline of 20%. At least EPS has managed not to go completely backwards from three years ago in aggregate, thanks to the earlier period of growth. Accordingly, shareholders probably wouldn't have been overly satisfied with the unstable medium-term growth rates.

Shifting to the future, estimates from the six analysts covering the company suggest earnings growth is heading into negative territory, declining 4.3% over the next year. With the market predicted to deliver 15% growth , that's a disappointing outcome.

With this information, we are not surprised that TEGNA is trading at a P/E lower than the market. Nonetheless, there's no guarantee the P/E has reached a floor yet with earnings going in reverse. There's potential for the P/E to fall to even lower levels if the company doesn't improve its profitability.

The Key Takeaway

Even after such a strong price move, TEGNA's P/E still trails the rest of the market significantly. Typically, we'd caution against reading too much into price-to-earnings ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

We've established that TEGNA maintains its low P/E on the weakness of its forecast for sliding earnings, as expected. At this stage investors feel the potential for an improvement in earnings isn't great enough to justify a higher P/E ratio. It's hard to see the share price rising strongly in the near future under these circumstances.

Before you settle on your opinion, we've discovered 4 warning signs for TEGNA (2 make us uncomfortable!) that you should be aware of.

Of course, you might find a fantastic investment by looking at a few good candidates. So take a peek at this free list of companies with a strong growth track record, trading on a low P/E.

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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.