LAY-OUT Planning Consultants Co. Ltd. (SZSE:300989) shares have had a really impressive month, gaining 27% after a shaky period beforehand. Longer-term shareholders would be thankful for the recovery in the share price since it's now virtually flat for the year after the recent bounce.

Since its price has surged higher, you could be forgiven for thinking LAY-OUT Planning Consultants is a stock to steer clear of with a price-to-sales ratios (or "P/S") of 6.6x, considering almost half the companies in China's Professional Services industry have P/S ratios below 2.9x. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the highly elevated P/S.

How Has LAY-OUT Planning Consultants Performed Recently?

It looks like revenue growth has deserted LAY-OUT Planning Consultants recently, which is not something to boast about. It might be that many are expecting an improvement to the uninspiring revenue performance over the coming period, which has kept the P/S from collapsing. However, if this isn't the case, investors might get caught out paying too much for the stock.

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

The only time you'd be truly comfortable seeing a P/S as steep as LAY-OUT Planning Consultants' is when the company's growth is on track to outshine the industry decidedly.

If we review the last year of revenue, the company posted a result that saw barely any deviation from a year ago. This isn't what shareholders were looking for as it means they've been left with a 10% decline in revenue over the last three years in total. Accordingly, shareholders would have felt downbeat about the medium-term rates of revenue growth.

Weighing that medium-term revenue trajectory against the broader industry's one-year forecast for expansion of 32% shows it's an unpleasant look.

With this information, we find it concerning that LAY-OUT Planning Consultants is trading at a P/S higher than the industry. Apparently many investors in the company are way more bullish than recent times would indicate and aren't willing to let go of their stock at any price. There's a very good chance existing shareholders are setting themselves up for future disappointment if the P/S falls to levels more in line with the recent negative growth rates.

What Does LAY-OUT Planning Consultants' P/S Mean For Investors?

LAY-OUT Planning Consultants' P/S has grown nicely over the last month thanks to a handy boost in the share price. Typically, we'd caution against reading too much into price-to-sales ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

Our examination of LAY-OUT Planning Consultants revealed its shrinking revenue over the medium-term isn't resulting in a P/S as low as we expected, given the industry is set to grow. With a revenue decline on investors' minds, the likelihood of a souring sentiment is quite high which could send the P/S back in line with what we'd expect. If recent medium-term revenue trends continue, it will place shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

And what about other risks? Every company has them, and we've spotted 3 warning signs for LAY-OUT Planning Consultants (of which 2 are significant!) you should know about.

Of course, profitable companies with a history of great earnings growth are generally safer bets. So you may wish to see this free collection of other companies that have reasonable P/E ratios and have grown earnings strongly.

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