Weigang Environmental Technology Holding Group Limited (HKG:1845) shareholders would be excited to see that the share price has had a great month, posting a 28% gain and recovering from prior weakness. But the gains over the last month weren't enough to make shareholders whole, as the share price is still down 5.8% in the last twelve months.

Since its price has surged higher, given close to half the companies operating in Hong Kong's Commercial Services industry have price-to-sales ratios (or "P/S") below 0.5x, you may consider Weigang Environmental Technology Holding Group as a stock to potentially avoid with its 1.1x P/S ratio. Although, it's not wise to just take the P/S at face value as there may be an explanation why it's as high as it is.

How Weigang Environmental Technology Holding Group Has Been Performing

Revenue has risen firmly for Weigang Environmental Technology Holding Group recently, which is pleasing to see. Perhaps the market is expecting this decent revenue performance to beat out the industry over the near term, which has kept the P/S propped up. 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 high as Weigang Environmental Technology Holding Group's is when the company's growth is on track to outshine the industry.

If we review the last year of revenue growth, the company posted a worthy increase of 9.4%. Still, lamentably revenue has fallen 57% in aggregate from three years ago, which is disappointing. Accordingly, shareholders would have felt downbeat about the medium-term rates of revenue growth.

In contrast to the company, the rest of the industry is expected to grow by 5.3% over the next year, which really puts the company's recent medium-term revenue decline into perspective.

With this information, we find it concerning that Weigang Environmental Technology Holding Group is trading at a P/S higher than the industry. It seems most investors are ignoring the recent poor growth rate and are hoping for a turnaround in the company's business prospects. Only the boldest would assume these prices are sustainable as a continuation of recent revenue trends is likely to weigh heavily on the share price eventually.

The Final Word

The large bounce in Weigang Environmental Technology Holding Group's shares has lifted the company's P/S handsomely. 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 Weigang Environmental Technology Holding Group 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. When we see revenue heading backwards and underperforming the industry forecasts, we feel the possibility of the share price declining is very real, bringing the P/S back into the realm of reasonability. Unless the the circumstances surrounding the recent medium-term improve, it wouldn't be wrong to expect a a difficult period ahead for the company's shareholders.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 2 warning signs with Weigang Environmental Technology Holding Group (at least 1 which shouldn't be ignored), and understanding them should be part of your investment process.

If companies with solid past earnings growth is up your alley, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

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