With a price-to-earnings (or "P/E") ratio of 10.2x BorgWarner Inc. (NYSE:BWA) may be sending bullish signals at the moment, given that almost half of all companies in the United States have P/E ratios greater than 19x and even P/E's higher than 35x are not unusual. However, the P/E might be low for a reason and it requires further investigation to determine if it's justified.

BorgWarner certainly has been doing a good job lately as its earnings growth has been positive while most other companies have been seeing their earnings go backwards. One possibility is that the P/E is low because investors think the company's earnings are going to fall away like everyone else's soon. If you like the company, you'd be hoping this isn't the case so that you could potentially pick up some stock while it's out of favour.

If you'd like to see what analysts are forecasting going forward, you should check out our free report on BorgWarner.

How Is BorgWarner's Growth Trending?

The only time you'd be truly comfortable seeing a P/E as low as BorgWarner's is when the company's growth is on track to lag the market.

Taking a look back first, we see that the company managed to grow earnings per share by a handy 4.7% last year. Ultimately though, it couldn't turn around the poor performance of the prior period, with EPS shrinking 1.6% in total over the last three years. Therefore, it's fair to say the earnings growth recently has been undesirable for the company.

Shifting to the future, estimates from the analysts covering the company suggest earnings should grow by 13% per year over the next three years. That's shaping up to be materially higher than the 10% per year growth forecast for the broader market.

In light of this, it's peculiar that BorgWarner's P/E sits below the majority of other companies. It looks like most investors are not convinced at all that the company can achieve future growth expectations.

What We Can Learn From BorgWarner's P/E?

While the price-to-earnings ratio shouldn't be the defining factor in whether you buy a stock or not, it's quite a capable barometer of earnings expectations.

We've established that BorgWarner currently trades on a much lower than expected P/E since its forecast growth is higher than the wider market. There could be some major unobserved threats to earnings preventing the P/E ratio from matching the positive outlook. It appears many are indeed anticipating earnings instability, because these conditions should normally provide a boost to the share price.

Before you take the next step, you should know about the 1 warning sign for BorgWarner that we have uncovered.

If you're unsure about the strength of BorgWarner's business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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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.