Perfect Optronics Limited (HKG:8311) shareholders are no doubt pleased to see that the share price has bounced 30% in the last month, although it is still struggling to make up recently lost ground. But the gains over the last month weren't enough to make shareholders whole, as the share price is still down 4.1% in the last twelve months.

Even after such a large jump in price, there still wouldn't be many who think Perfect Optronics' price-to-sales (or "P/S") ratio of 0.8x is worth a mention when the median P/S in Hong Kong's Electronic industry is similar at about 0.4x. While this might not raise any eyebrows, if the P/S ratio is not justified investors could be missing out on a potential opportunity or ignoring looming disappointment.

How Perfect Optronics Has Been Performing

For instance, Perfect Optronics' receding revenue in recent times would have to be some food for thought. Perhaps investors believe the recent revenue performance is enough to keep in line with the industry, which is keeping the P/S from dropping off. If you like the company, you'd at least be hoping this is the case so that you could potentially pick up some stock while it's not quite in favour.

How Is Perfect Optronics' Revenue Growth Trending?

Perfect Optronics' P/S ratio would be typical for a company that's only expected to deliver moderate growth, and importantly, perform in line with the industry.

Retrospectively, the last year delivered a frustrating 59% decrease to the company's top line. This means it has also seen a slide in revenue over the longer-term as revenue is down 40% in total over the last three years. 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 19% shows it's an unpleasant look.

In light of this, it's somewhat alarming that Perfect Optronics' P/S sits in line with the majority of other companies. Apparently many investors in the company are way less bearish than recent times would indicate and aren't willing to let go of their stock right now. Only the boldest would assume these prices are sustainable as a continuation of recent revenue trends is likely to weigh on the share price eventually.

The Key Takeaway

Perfect Optronics appears to be back in favour with a solid price jump bringing its P/S back in line with other companies in the industry It's argued the price-to-sales ratio is an inferior measure of value within certain industries, but it can be a powerful business sentiment indicator.

The fact that Perfect Optronics currently trades at a P/S on par with the rest of the industry is surprising to us since its recent revenues have been in decline over the medium-term, all while the industry is set to grow. When we see revenue heading backwards in the context of growing industry forecasts, it'd make sense to expect a possible share price decline on the horizon, sending the moderate P/S lower. 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.

There are also other vital risk factors to consider and we've discovered 3 warning signs for Perfect Optronics (2 shouldn't be ignored!) that you should be aware of before investing here.

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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