Shanghai XNG Holdings Limited (HKG:3666) shares have had a horrible month, losing 28% after a relatively good period beforehand. The drop over the last 30 days has capped off a tough year for shareholders, with the share price down 31% in that time.

Following the heavy fall in price, Shanghai XNG Holdings may be sending buy signals at present with its price-to-sales (or "P/S") ratio of 0.2x, considering almost half of all companies in the Hospitality industry in Hong Kong have P/S ratios greater than 0.8x and even P/S higher than 3x aren't out of the ordinary. However, the P/S might be low for a reason and it requires further investigation to determine if it's justified.

What Does Shanghai XNG Holdings' Recent Performance Look Like?

For instance, Shanghai XNG Holdings' receding revenue in recent times would have to be some food for thought. Perhaps the market believes the recent revenue performance isn't good enough to keep up the industry, causing the P/S ratio to suffer. Those who are bullish on Shanghai XNG Holdings will be hoping that this isn't the case so that they can pick up the stock at a lower valuation.

What Are Revenue Growth Metrics Telling Us About The Low P/S?

There's an inherent assumption that a company should underperform the industry for P/S ratios like Shanghai XNG Holdings' to be considered reasonable.

Taking a look back first, the company's revenue growth last year wasn't something to get excited about as it posted a disappointing decline of 6.1%. This means it has also seen a slide in revenue over the longer-term as revenue is down 48% in total over the last three years. So unfortunately, we have to acknowledge that the company has not done a great job of growing revenue over that time.

Weighing that medium-term revenue trajectory against the broader industry's one-year forecast for expansion of 23% shows it's an unpleasant look.

With this in mind, we understand why Shanghai XNG Holdings' P/S is lower than most of its industry peers. However, we think shrinking revenues are unlikely to lead to a stable P/S over the longer term, which could set up shareholders for future disappointment. Even just maintaining these prices could be difficult to achieve as recent revenue trends are already weighing down the shares.

The Bottom Line On Shanghai XNG Holdings' P/S

The southerly movements of Shanghai XNG Holdings' shares means its P/S is now sitting at a pretty low level. Using the price-to-sales ratio alone to determine if you should sell your stock isn't sensible, however it can be a practical guide to the company's future prospects.

Our examination of Shanghai XNG Holdings confirms that the company's shrinking revenue over the past medium-term is a key factor in its low price-to-sales ratio, given the industry is projected to grow. At this stage investors feel the potential for an improvement in revenue isn't great enough to justify a higher P/S ratio. Unless the recent medium-term conditions improve, they will continue to form a barrier for the share price around these levels.

There are also other vital risk factors to consider and we've discovered 5 warning signs for Shanghai XNG Holdings (3 are a bit concerning!) that you should be aware of before investing here.

If strong companies turning a profit tickle your fancy, then you'll want to check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.