Ralph Lauren Corporation (NYSE:RL) shares have continued their recent momentum with a 27% gain in the last month alone. The last 30 days bring the annual gain to a very sharp 48%.

After such a large jump in price, Ralph Lauren may be sending bearish signals at the moment with its price-to-earnings (or "P/E") ratio of 19x, since almost half of all companies in the United States have P/E ratios under 16x and even P/E's lower than 9x are not unusual. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's as high as it is.

Recent times have been pleasing for Ralph Lauren as its earnings have risen in spite of the market's earnings going into reverse. It seems that many are expecting the company to continue defying the broader market adversity, which has increased investors' willingness to pay up for the stock. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

Does Growth Match The High P/E?

In order to justify its P/E ratio, Ralph Lauren would need to produce impressive growth in excess of the market.

Taking a look back first, we see that the company grew earnings per share by an impressive 20% last year. However, the latest three year period hasn't been as great in aggregate as it didn't manage to provide any growth at all. Accordingly, shareholders probably wouldn't have been overly satisfied with the unstable medium-term growth rates.

Shifting to the future, estimates from the analysts covering the company suggest earnings should grow by 12% per year over the next three years. With the market predicted to deliver 10% growth per year, the company is positioned for a comparable earnings result.

In light of this, it's curious that Ralph Lauren's P/E sits above the majority of other companies. Apparently many investors in the company are more bullish than analysts indicate and aren't willing to let go of their stock right now. Although, additional gains will be difficult to achieve as this level of earnings growth is likely to weigh down the share price eventually.

The Bottom Line On Ralph Lauren's P/E

Ralph Lauren shares have received a push in the right direction, but its P/E is elevated too. Generally, our preference is to limit the use of the price-to-earnings ratio to establishing what the market thinks about the overall health of a company.

Our examination of Ralph Lauren's analyst forecasts revealed that its market-matching earnings outlook isn't impacting its high P/E as much as we would have predicted. When we see an average earnings outlook with market-like growth, we suspect the share price is at risk of declining, sending the high P/E lower. Unless these conditions improve, it's challenging to accept these prices as being reasonable.

Before you settle on your opinion, we've discovered 2 warning signs for Ralph Lauren 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.