Despite an already strong run, Altus Power, Inc. (NYSE:AMPS) shares have been powering on, with a gain of 25% in the last thirty days. Unfortunately, the gains of the last month did little to right the losses of the last year with the stock still down 27% over that time.

Although its price has surged higher, you could still be forgiven for feeling indifferent about Altus Power's P/E ratio of 17.7x, since the median price-to-earnings (or "P/E") ratio in the United States is also close to 19x. While this might not raise any eyebrows, if the P/E ratio is not justified investors could be missing out on a potential opportunity or ignoring looming disappointment.

Altus Power could be doing better as its earnings have been going backwards lately while most other companies have been seeing positive earnings growth. It might be that many expect the dour earnings performance to strengthen positively, which has kept the P/E from falling. If not, then existing shareholders may be a little nervous about the viability of the share price.

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

Is There Some Growth For Altus Power?

Altus Power's P/E ratio would be typical for a company that's only expected to deliver moderate growth, and importantly, perform in line with the market.

Retrospectively, the last year delivered a frustrating 58% decrease to the company's bottom line. However, a few very strong years before that means that it was still able to grow EPS by an impressive 300% in total over the last three years. Although it's been a bumpy ride, it's still fair to say the earnings growth recently has been more than adequate for the company.

Shifting to the future, estimates from the ten analysts covering the company suggest earnings growth is heading into negative territory, declining 84% over the next year. With the market predicted to deliver 15% growth , that's a disappointing outcome.

With this information, we find it concerning that Altus Power is trading at a fairly similar P/E to the market. It seems most investors are hoping for a turnaround in the company's business prospects, but the analyst cohort is not so confident this will happen. There's a good chance these shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with the negative growth outlook.

What We Can Learn From Altus Power's P/E?

Altus Power appears to be back in favour with a solid price jump getting its P/E back in line with most other companies. 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.

Our examination of Altus Power's analyst forecasts revealed that its outlook for shrinking earnings isn't impacting its P/E as much as we would have predicted. Right now we are uncomfortable with the P/E as the predicted future earnings are unlikely to support a more positive sentiment for long. Unless these conditions improve, it's challenging to accept these prices as being reasonable.

Before you take the next step, you should know about the 5 warning signs for Altus Power (2 make us uncomfortable!) that we have uncovered.

It's important to make sure you look for a great company, not just the first idea you come across. So take a peek at this free list of interesting companies with strong recent earnings growth (and 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.